Fused pyrimidine derivatives as A2A / A2B inhibitors

ABSTRACT

This application relates to compounds of Formula (I): 
                         
or pharmaceutically acceptable salts thereof, which modulate the activity of adenosine receptors, such as subtypes A2A and A2B receptors, and are useful in the treatment of diseases related to the activity of adenosine receptors including, for example, cancer, inflammatory diseases, cardiovascular diseases, and neurodegenerative diseases.

TECHNICAL FIELD

The present invention provides fused pyrimidine derivatives that modulate the activity of adenosine receptors, such as subtypes A2A and A2B, and are useful in the treatment of diseases related to the activity of adenosine receptors including, for example, cancer, inflammatory diseases, cardiovascular diseases, and neurodegenerative diseases.

BACKGROUND

Adenosine is an extracellular signaling molecule that can modulate immune responses through many immune cell types. Adenosine was first recognized as a physiologic regulator of coronary vascular tone by Drury and Szent-Györgyu (Sachdeva, S. and Gupta, M. Saudi Pharmaceutical Journal, 2013, 21, 245-253), however it was not until 1970 that Sattin and Rall showed that adenosine regulates cell function via occupancy of specific receptors on the cell surface (Sattin, A., and Rall, T. W., 1970. Mol. Pharmacol. 6, 13-23; Hasko', G., at al., 2007, Pharmacol. Ther. 113, 264-275).

Adenosine plays a vital role in various other physiological functions. It is involved in the synthesis of nucleic acids, when linked to three phosphate groups; it forms ATP, the integral component of the cellular energy system. Adenosine can be generated by the enzymatic breakdown of extracellular ATP, or can be also released from injured neurons and glial cells by passing the damaged plasma membrane (Tautenhahn, M. et al. Neuropharmacology, 2012, 62, 1756-1766). Adenosine produces various pharmacological effects, both in periphery and in the central nervous system, through an action on specific receptors localized on cell membranes (Matsumoto, T. et al. Pharmacol. Res., 2012, 65, 81-90). Alternative pathways for extracellular adenosine generation have been described. These pathways include the production of adenosine from nicotinamide dinucleotide (NAD) instead of ATP by the concerted action of CD38, CD203a and CD73. CD73-independent production of adenosine can also occur by other phosphates such as alkaline phosphatase or prostate-specific phosphatase.

There are four known subtypes of adenosine receptor in humans including A1, A2A, A2B and A3 receptors. A1 and A2A are high affinity receptors, whereas A2B and A3 are low affinity receptors. Adenosine and its agonists can act via one or more of these receptors and can modulate the activity of adenylate cyclase, the enzyme responsible for increasing cyclic AMP (cAMP). The different receptors have differential stimulatory and inhibitory effects on this enzyme. Increased intracellular concentrations of cAMP can suppress the activity of immune and inflammatory cells (Livingston, M. et al., Inflamm. Res., 2004, 53, 171-178).

The A2A adenosine receptor can signal in the periphery and the CNS, with agonists explored as anti-inflammatory drugs and antagonists explored for neurodegenerative diseases (Carlsson, J. et al., J. Med. Chem., 2010, 53, 3748-3755). In most cell types the A2A subtype inhibits intracellular calcium levels whereas the A2B potentiates them. The A2A receptor generally appears to inhibit inflammatory response from immune cells (Borrmann, T. et al., J. Med. Chem., 2009, 52(13), 3994-4006).

A2B receptors are highly expressed in the gastrointestinal tract, bladder, lung, and on mast cells (Antonioli, L. et al., Nature Reviews Cancer, 2013, 13, 842-857). The A2B receptor, although structurally closely related to the A2A receptor and able to activate adenylate cyclase, is functionally different. It has been postulated that this subtype may utilize signal transduction systems other than adenylate cyclase (Livingston, M. et al., Inflamm. Res., 2004, 53, 171-178). Among all the adenosine receptors, the A2B adenosine receptor is a low affinity receptor that is thought to remain silent under physiological conditions and to be activated in consequence of increased extracellular adenosine levels (Ryzhov, S. et al. Neoplasia, 2008, 10, 987-995). Activation of A2B adenosine receptor can stimulate adenylate cyclase and phospholipase C through activation of Gs and Gq proteins, respectively. Coupling to mitogen activated protein kinases has also been described (Borrmann, T. et al., J. Med. Chem., 2009, 52(13), 3994-4006).

In the immune system, engagement of adenosine signaling can be a critical regulatory mechanism that protects tissues against excessive immune reactions. Adenosine can negatively modulate immune responses through many immune cell types, including T-cells, natural-killer cells, macrophages, dendritic cells, mast cells and myeloid-derived suppressor cells (Allard, B. et al. Current Opinion in Pharmacology, 2016, 29, 7-16).

In tumors, this pathway is hijacked by tumor micro-environments and sabotages the antitumor capacity of immune system, promoting cancer progression. In the tumor micro-environment, adenosine was mainly generated from extracellular ATP by CD39 and CD73. Multiple cell types can generate adenosine by expressing CD39 and CD73. This is the case for tumor cells, T-effector cells, T-regulatory cells, tumor associated macrophages, myeloid derived suppressive cells (MDSCs), endothelial cells, cancer-associated fibroblast (CAFs) and mesenchymal stromal/stem cells (MSCs). Hypoxia, inflammation and other immune-suppressive signaling in tumor micro-environment can induce expression of CD39, CD73 and subsequent adenosine production. As a result, adenosine level in solid tumors is unusually high compared to normal physiological conditions.

A2A are mostly expressed on lymphoid-derived cells, including T-effector cells, T regulatory cells and nature killing cells. Blocking A2A receptor can prevent downstream immunosuppressive signals that temporarily inactivate T cells. A2B receptors are mainly expressed on monocyte-derived cells including dendritic cells, tumor-associated macrophages, myeloid derived suppressive cells (MDSCs), and mesenchymal stromal/stem cells (MSCs). Blocking A2B receptor in preclinical models can suppress tumor growth, block metastasis, and increase the presentation of tumor antigens.

In terms of safety profile of ADORA2A/ADORA2B (A2A/A2B) blockage, the A2A and A2B receptor knockout mice are all viable, showing no growth abnormalities and are fertile (Allard, B. et al. Current Opinion in Pharmacology, 2016, 29, 7-16). A2A KO mice displayed increased levels of pro-inflammatory cytokines only upon challenge with LPS and no evidence of inflammation at baseline (Antonioli, L. et al., Nature Reviews Cancer, 2013, 13, 842-857). A2B KO mice exhibited normal platelet, red blood, and white cell counts but increased inflammation at baseline (TNF-alpha, IL-6) in naive A2B KO mice (Antonioli, L. et al., Nature Reviews Cancer, 2013, 13, 842-857). Exaggerated production of TNF-alpha and IL-6 was detected following LPS treatment. A2B KO mice also exhibited increased vascular adhesion molecules that mediate inflammation as well leukocyte adhesion/rolling; enhanced mast-cell activation; increased sensitivity to IgE-mediated anaphylaxis and increased vascular leakage and neutrophil influx under hypoxia (Antonioli, L. et al., Nature Reviews Cancer, 2013, 13, 842-857).

In summary, there is a need to develop new adenosine receptor selective ligands, such as for subtypes A2A and A2B, for the treatment of diseases such as cancer, inflammatory diseases, cardiovascular diseases, and neurodegenerative diseases. This application is directed to this need and others.

SUMMARY

The present invention relates to, inter alia, compounds of Formula (I):

or pharmaceutically acceptable salts thereof, wherein constituent members are defined herein.

The present invention further provides pharmaceutical compositions comprising a compound of Formula (I), or a pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable carrier.

The present invention further provides methods of inhibiting an activity of an adenosine receptor, comprising contacting the receptor with a compound of Formula (I), or a pharmaceutically acceptable salt thereof.

The present invention further provides methods of treating a disease or a disorder associated with abnormal expression of adenosine receptors, comprising administering to said patient a therapeutically effective amount of a compound of Formula (I), or a pharmaceutically acceptable salt thereof.

The present invention further provides a compound of Formula (I), or a pharmaceutically acceptable salt thereof, for use in any of the methods described herein.

The present invention further provides use of a compound of Formula (I), or a pharmaceutically acceptable salt thereof, for the preparation of a medicament for use in any of the methods described herein.

DETAILED DESCRIPTION

Compounds

The present application provides, inter alia, compounds of Formula (I):

or pharmaceutically acceptable salts thereof, wherein:

R¹ is selected from H, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, C(O)R^(b1), C(O)NR^(c1)R^(d1), C(O)OR^(a1), C(═NR^(e1))R^(b1), C(═NR^(e1))NR^(c1)R^(d1), S(O)₂R^(b1), and S(O)₂NR^(c1)R^(d1), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, and C₁₋₆ haloalkyl of R¹ are each optionally substituted with 1, 2, 3, or 4 independently selected R^(1A) substituents;

each R^(a1), R^(b1), R^(c1), and R^(d1) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl, wherein the C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl of R^(a1), R^(b1), R^(c1), and R^(d1) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(1A) substituents;

each R^(e1) is independently selected from H, OH, CN, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, and C₂₋₆ alkynyl;

each R^(1A) is independently selected from OH, CN, halo, C₁₋₃ alkyl, C₂₋₃ alkenyl, C₂₋₃ alkynyl, C₁₋₃ haloalkyl, C₁₋₃ alkoxy, C₁₋₃ haloalkoxy, amino, C₁₋₃ alkylamino, and di(C₁₋₃ alkyl)amino;

R² is selected from H, D, halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-, CN, NO₂, OR^(a2), SR^(a2), NHOR^(a2), C(O)R^(b2), C(O)NR^(c2)R^(d2), C(O)NR^(c2)(OR^(a2)), C(O)OR^(a2), OC(O)R^(b2), OC(O)NR^(c2)R^(d2), NR^(c2)R^(d2), NR^(c2)NR^(c2)R^(d2), NR^(c2)C(O)R^(b2), NR^(c2)C(O)OR^(a2), NR^(c2)C(O)NR^(c2)R^(d2), C(═NR^(e2))R^(b2), C(═NOH)R^(b2), C(═NCN)R^(b2), C(═NR^(e2))NR^(c2)R^(d2), NR^(c2)C(═NR^(e2))NR^(c2)R^(d2), NR^(c2)C(═NOH)NR^(c2)R^(d2), NR^(c2)C(═NCN)NR^(c2)R^(d2), NR^(c2)C(═NR^(e2))R^(b2), NR^(c2)S(O)NR^(c2)R^(d2), NR^(c2)S(O)R^(b2), NR^(c2)S(O)₂R^(b2), NR^(c2)S(O)(═NR^(e2))R^(b2), NR^(c2)S(O)₂NR^(c2)R^(d2) S(O)R^(b2), S(O)NR^(c2)R^(d2), S(O)₂R^(b2), S(O)₂NR^(c2)R^(d2), OS(O)(═NR^(e2))R^(b2), OS(O)₂R^(b2), SF₅, P(O)R^(f2)R^(g2), OP(O)(OR^(h2))(OR^(i2)), P(O)(OR^(h2))(OR^(i2)), and BR^(j2)R^(k2), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl- of R² are each optionally substituted with 1, 2, 3, or 4 independently selected R^(2A) substituents;

each R^(a2), R^(b2), R^(c2), and R^(d2) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl- of R^(a2), R^(b2), R^(c2) and R^(d2) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(2A) substituents;

or, any R^(c2) and R^(d2), attached to the same N atom, together with the N atom to which they are attached, form a 4-10 membered heterocycloalkyl group, wherein the 4-10 membered heterocycloalkyl group is optionally substituted with 1, 2, 3, or 4 independently selected R^(2A) substituents;

each R^(e2) is independently selected from H, OH, CN, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, and C₂₋₆ alkynyl;

each R^(f2) and R^(g2) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered hetereocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered hetereocycloalkyl)-C₁₋₆ alkyl-; each R^(h2) and R^(i2) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered hetereocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered hetereocycloalkyl)-C₁₋₆ alkyl-;

each R^(j2) and R^(k2) is independently selected from OH, C₁₋₆ alkoxy, and C₁₋₆ haloalkoxy; or any R^(j2) and R^(k2) attached to the same B atom, together with the B atom to which they are attached, form a 5- or 6-membered heterocycloalkyl group optionally substituted with 1, 2, 3, or 4 substituents independently selected from C₁₋₆ alkyl and C₁₋₆ haloalkyl;

each R^(2A) is selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-, CN, NO₂, OR^(a21), SR^(a21), NHOR^(a21), C(O)R^(b21), C(O)NR^(c21)R^(d21), C(O)NR^(c21)(OR^(a21)), C(O)OR^(a21), OC(O)R^(b21), OC(O)NR^(c2)R^(d21), NR^(c21)R^(d21), NR^(c21)NR^(c21)R^(d21), NR^(c21)C(O)R^(b21), NR^(c21)C(O)OR^(a21), NR^(c21)C(O)NR^(c21)R^(d21), C(═NR^(e21))R^(b21), C(═NOH)R^(b21), C(═NCN)R^(b21), C(═NR^(e21))NR^(c21)R^(d21), NR^(c21)C(═NR^(e2))NR^(c21)R^(d21), NR^(c21)C(═NOH)NR^(c21)R^(d2)1 NR^(c21)C(═NCN)NR^(c21)R^(d2), NR^(c21)C(═NR^(e21))R^(b21), NR^(c21)S(O)NR^(c21)R^(d21), NR^(c21)S(O)R^(b21) NR^(c21)S(O)₂R^(b21), NR^(c21)S(O)(═NR^(e21))R^(b21), NR^(c21)S(O)₂NR^(c21)R^(d21), S(O)R^(b21), S(O)NR^(c21)R^(d2), S(O)₂R^(b21), S(O)₂NR^(c21)R^(d21), OS(O)(═NR^(e21))R^(b21), OS(O)₂R^(b21), SF₅, P(O)R^(f21)R^(g21), OP(O)(OR^(h21))(OR^(i21)), P(O)(OR^(h21))(OR^(i21)), and BR^(j21)R^(k21), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl- of R^(2A) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(2B) substituents;

each R^(a21), R^(b21), R^(c21) and R^(d21) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl- of R^(a21), R^(b21), R^(c21) and R^(d21) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(2B) substituents;

or, any R^(c21) and R^(d21), attached to the same N atom, together with the N atom to which they are attached, form a 4-, 5-, 6-, or 7-membered heterocycloalkyl group, wherein the 4-, 5-, 6-, or 7-membered heterocycloalkyl group is optionally substituted with 1, 2, 3, or 4 independently selected R^(2B) substituents;

each R^(e21) is independently selected from H, OH, CN, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, and C₂₋₆ alkynyl;

each R^(f21) and R^(g21) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered hetereocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered hetereocycloalkyl)-C₁₋₆ alkyl-;

each R^(h21) and R^(i21) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered hetereocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered hetereocycloalkyl)-C₁₋₆ alkyl-;

each R^(j21) and R^(k21) is independently selected from OH, C₁₋₆ alkoxy, and C₁₋₆ haloalkoxy;

or any R^(j21) and R^(k21) attached to the same B atom, together with the B atom to which they are attached, form a 5- or 6-membered heterocycloalkyl group optionally substituted with 1, 2, 3, or 4 substituents independently selected from C₁₋₆ alkyl and C₁₋₆ haloalkyl;

each R^(2B) is independently selected from OH, NO₂, CN, halo, C₁₋₃ alkyl, C₂₋₃ alkenyl, C₂₋₃ alkynyl, C₁₋₃ haloalkyl, cyano-C₁₋₃ alkyl, HO—C₁₋₃ alkyl, C₁₋₃ alkoxy-C₁₋₃ alkyl, C₃₋₅ cycloalkyl, C₁₋₃ alkoxy, C₁₋₃ haloalkoxy, amino, C₁₋₃ alkylamino, di(C₁₋₃ alkyl)amino, thio, C₁₋₃ alkylthio, C₁₋₃ alkylsulfinyl, C₁₋₃ alkylsulfonyl, carbamyl, C₁₋₃ alkylcarbamyl, di(C₁₋₃ alkyl)carbamyl, carboxy, C₁₋₃ alkylcarbonyl, C₁₋₄ alkoxycarbonyl, C₁₋₃ alkylcarbonylamino, C₁₋₃ alkoxycarbonylamino, C₁₋₃ alkylcarbonyloxy, aminocarbonyloxy, C₁₋₃ alkylaminocarbonyloxy, di(C₁₋₃ alkyl)aminocarbonyloxy, C₁₋₃ alkylsulfonylamino, aminosulfonyl, C₁₋₃ alkylaminosulfonyl, di(C₁₋₃ alkyl)aminosulfonyl, aminosulfonylamino, C₁₋₃ alkylaminosulfonylamino, di(C₁₋₃ alkyl)aminosulfonylamino, aminocarbonylamino, C₁₋₃ alkylaminocarbonylamino, and di(C₁₋₃ alkyl)aminocarbonylamino;

X³ is N or CR³;

R³ is selected from H, D, halo, OH, CN, NO₂, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ alkoxy, C₁₋₆ haloalkoxy, cyano-C₁₋₃ alkyl, HO—C₁₋₃ alkyl, C₁₋₃ alkoxy-C₁₋₃ alkyl, C₃₋₅ cycloalkyl, amino, C₁₋₃ alkylamino, di(C₁₋₃ alkyl)amino, thio, C₁₋₃ alkylthio, C₁₋₃ alkylsulfinyl, C₁₋₃ alkylsulfonyl, carbamyl, C₁₋₃ alkylcarbamyl, di(C₁₋₃ alkyl)carbamyl, carboxy, C₁₋₃ alkylcarbonyl, C₁₋₄ alkoxycarbonyl, C₁₋₃ alkylcarbonylamino, C₁₋₃ alkoxycarbonylamino, C₁₋₃ alkylcarbonyloxy, aminocarbonyloxy, C₁₋₃ alkylaminocarbonyloxy, di(C₁₋₃ alkyl)aminocarbonyloxy, C₁₋₃ alkylsulfonylamino, aminosulfonyl, C₁₋₃ alkylaminosulfonyl, di(C₁₋₃ alkyl)aminosulfonyl, aminosulfonylamino, C₁₋₃ alkylaminosulfonylamino, di(C₁₋₃ alkyl)aminosulfonylamino, aminocarbonylamino, C₁₋₃ alkylaminocarbonylamino, and di(C₁₋₃ alkyl)aminocarbonylamino;

Cy¹ is selected from C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, and 4-10 membered heterocycloalkyl, wherein the C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, and 4-10 membered heterocycloalkyl of Cy¹ are each optionally substituted with 1, 2, 3, or 4 independently selected R⁷ substituents;

each R⁷ is selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-, CN, NO₂, OR^(a7), SR^(a7), NHOR^(a7), C(O)R^(b7), C(O)NR^(c7)R^(d7), C(O)NR^(c7)(OR^(a7)), C(O)OR^(a7), OC(O)R^(b7), OC(O)NR^(c7)R^(d7), NR^(c7)R^(d7), NR^(c7)NR^(c7)R^(d7), NR^(c7)C(O)R^(b7), NR^(c7)C(O)OR^(a7), NR^(c7)C(O)NR^(c7)R^(d7), C(═NR^(c7))R^(b7), C(═NOH)R^(b7), C(═NCN)R^(b7), C(═NR^(e7))NR^(c7)R^(d7), NR^(c7)C(═NR^(e7))NR^(c7)R^(d7), NR^(c7)C(═NOH)NR^(c7)R^(d7), NR^(c7)C(═NCN)NR^(c7)R^(d7), NR^(c7)C(═NR^(e7))R^(b7), NR^(c7)S(O)NR^(c7)R^(d7), NR^(c7)S(O)R^(b7), NR^(c7)S(O)₂R^(b7), NR^(c7)S(O)(═NR^(e7))R^(b7), NR^(c7)S(O)₂NR^(c7)R^(d7), S(O)R^(b7), S(O)NR^(c7)R^(d7), S(O)₂R^(b7), S(O)₂NR^(c7)R^(d7), OS(O)(═NR^(e7))R^(b7), OS(O)₂R^(b7), SF₅, P(O)R^(f7)R^(g7), OP(O)(OR^(h7))(OR^(i7)), P(O)(OR^(h7))(OR^(i7)), and BR^(j7)R^(k7), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl- of R⁷ are each optionally substituted with 1, 2, 3, or 4 independently selected R^(7A) substituents;

each R^(a7), R^(b7), R^(c7), and R^(d7) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl- of R^(a7), R^(b7), R^(c7) and R^(d7) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(7A) substituents;

or, any R^(c7) and R^(d7), attached to the same N atom, together with the N atom to which they are attached, form a 4-, 5-, 6-, or 7-membered heterocycloalkyl group, wherein the 4-, 5-, 6-, or 7-membered heterocycloalkyl group is optionally substituted with 1, 2, 3, or 4 independently selected R^(7A) substituents;

each R^(e7) is independently selected from H, OH, CN, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, and C₂₋₆ alkynyl;

each R^(f7) and R^(g7) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered hetereocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered hetereocycloalkyl)-C₁₋₆ alkyl-;

each R^(h7) and R^(i7) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered hetereocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered hetereocycloalkyl)-C₁₋₆ alkyl-;

each R^(j7) and R^(k7) is independently selected from OH, C₁₋₆ alkoxy, and C₁₋₆ haloalkoxy;

or any R^(j7) and R^(k7) attached to the same B atom, together with the B atom to which they are attached, form a 5- or 6-membered heterocycloalkyl group optionally substituted with 1, 2, 3, or 4 substituents independently selected from C₁₋₆ alkyl and C₁₋₆ haloalkyl;

each R^(7A) is independently selected from OH, NO₂, CN, halo, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, cyano-C₁₋₆ alkyl, HO—C₁₋₆ alkyl, C₁₋₆ alkoxy-C₁₋₆ alkyl, C₃₋₅ cycloalkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkoxy, amino, C₁₋₆ alkylamino, di(C₁₋₆ alkyl)amino, thio, C₁₋₆ alkylthio, C₁₋₆ alkylsulfinyl, C₁₋₆ alkylsulfonyl, carbamyl, C₁₋₆ alkylcarbamyl, di(C₁₋₆ alkyl)carbamyl, carboxy, C₁₋₆ alkylcarbonyl, C₁₋₄ alkoxycarbonyl, C₁₋₆ alkylcarbonylamino, C₁₋₆ alkoxycarbonylamino, C₁₋₆ alkylcarbonyloxy, aminocarbonyloxy, C₁₋₆ alkylaminocarbonyloxy, di(C₁₋₆ alkyl)aminocarbonyloxy, C₁₋₆ alkylsulfonylamino, aminosulfonyl, C₁₋₆ alkylaminosulfonyl, di(C₁₋₆ alkyl)aminosulfonyl, aminosulfonylamino, C₁₋₆ alkylaminosulfonylamino, di(C₁₋₆ alkyl)aminosulfonylamino, aminocarbonylamino, C₁₋₆ alkylaminocarbonylamino, and di(C₁₋₆ alkyl)aminocarbonylamino;

R⁴ is selected from —C(O)NR⁵R⁶ and -L-Cy⁴;

L is selected from Y¹, C₁₋₆ alkylene, C₂₋₆ alkenylene, C₂₋₆ alkynylene, C₁₋₆ alkylene-Y¹, Y¹—C₁₋₆ alkylene, C₁₋₆ alkylene-Y—C₁₋₆ alkylene, Y¹—C₁₋₆ alkylene-Y¹—, Y¹—C₁₋₆ alkylene-Y¹—C₁₋₆alkylene, and C₁₋₆ alkylene-Y¹—C₁₋₆ alkylene-Y¹, wherein said alkylene, alkenylene, and alkynylene linking groups are each optionally substituted with 1, 2, or 3 substituents independently selected from R^(8D) and R⁸;

each Y¹ is independently selected from —O—, —S—, —C(O)—, —C(O)NR^(Y)—, —C(O)O—, —OC(O)—, —OC(O)NR^(Y)—, —NR^(Y)—, —NR^(Y)C(O)—, —NR^(Y)C(O)O—, —NR^(Y)C(O)NR^(Y)—, —NR^(Y)S(O)₂—, —S(O)₂—, —S(O)₂NR^(Y)—, and —NR^(Y)S(O)₂NR^(Y)—;

each R^(Y) is independently selected from H, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-, and S(O)₂R^(b5), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl- of R^(Y) is optionally substituted with 1, 2, 3, or 4 substituents independently selected from R^(8D) and R⁸;

Cy⁴ is selected from C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, and 4-10 membered heterocycloalkyl, each of which are optionally substituted with 1, 2, 3, 4, or 5 substituents independently selected from R^(8D) and R⁸;

R⁵ and R⁶ are each independently selected from H, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, and S(O)₂R^(b5), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, and C₁₋₆ haloalkyl of R⁵ or R⁶ is optionally substituted with 1, 2, 3, or 4 substituents independently selected from R^(8D) and R⁸;

each R^(b5) is independently selected from C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₃₋₇ cycloalkyl, 4-7 membered heterocycloalkyl, C₃₋₇ cycloalkyl-C₁₋₆ alkyl-, and (4-7 membered heterocycloalkyl)-C₁₋₆ alkyl-;

each R⁸ is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-, CN, NO₂, OR^(a8), SR^(a8), NHOR^(a8), C(O)R^(b8), C(O)NR^(C8)R^(d8), C(O)NR^(c8)(OR^(a8)), C(O)OR^(a8), OC(O)R^(b8), OC(O)NR^(c8)R^(d8), NR^(c8)R^(d8), NR^(c8)NR^(c8)R^(d8), NR^(c8)C(O)R^(b8), NR^(c8)C(O)OR^(a8), NR^(c8)C(O)NR^(c8)R^(d8), C(═NR^(a8))R^(b8), C(═NOH)R^(b8), C(═NCN)R^(b8), C(═NR^(e8))NR^(c8)R^(d8), NR^(c8)C(═NR^(e8))NR^(c8)R^(d8), NR^(c8)C(═NOH)NR^(c8)R^(d8), NR^(c8)C(═NCN)NR^(c8)R^(d8), NR^(c8)C(═NR^(e8))R^(b8), NR^(c8)S(O)NR^(c8)R^(d8), NR^(c8)S(O)R^(b8), NR^(c8)S(O)₂R^(b8), NR^(c8)S(O)(═NR^(e8))R^(b8), NR^(c8)S(O)₂NR^(c8)R^(d8), S(O)R^(b8), S(O)NR^(c8)R^(d8), S(O)₂R^(b8), S(O)₂NR^(c8)R^(d8), OS(O)(═NR^(e8))R^(b8), OS(O)₂R^(b8), SF₅, P(O)R^(f8)R^(g8), OP(O)(OR^(h8))(OR^(i8)), P(O)(OR^(h8))(OR^(i8)), and BR^(j8)R^(k8), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl- of R⁸ are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8A) substituents;

each R^(a8), R^(b8), R^(c8), and R^(d8) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl- of R^(a8), R^(b8), R^(c8) and R^(d8) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8A) substituents;

or, any R^(c8) and R^(d8), attached to the same N atom, together with the N atom to which they are attached, form a 4-10 membered heterocycloalkyl group, wherein the 4-10 membered heterocycloalkyl group is optionally substituted with 1, 2, 3, or 4 independently selected R^(8A) substituents;

each R^(e8) is independently selected from H, OH, CN, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, and C₂₋₆ alkynyl;

each R and R^(g8) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered hetereocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered hetereocycloalkyl)-C₁₋₆ alkyl-;

each R^(h8) and R^(i8) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered hetereocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered hetereocycloalkyl)-C₁₋₆ alkyl-;

each R^(j8) and R^(k8) is independently selected from OH, C₁₋₆ alkoxy, and C₁₋₆ haloalkoxy;

or any R^(j8) and R^(k8) attached to the same B atom, together with the B atom to which they are attached, form a 5- or 6-membered heterocycloalkyl group optionally substituted with 1, 2, 3, or 4 substituents independently selected from C₁₋₆ alkyl and C₁₋₆ haloalkyl;

each R^(8A) is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-, CN, NO₂, OR^(a81), SR^(a81), NHOR^(a81), C(O)R^(b81)C(O)NR^(c81)R^(d81), C(O)NR^(c81)(OR^(a81)), C(O)OR^(a81), OC(O)R^(b81), OC(O)NR^(c81)R^(d81), NR^(c81)R^(d81), NR^(c81)NR^(c81)R^(d81), NR^(c81)C(O)R^(b81), NR^(c81)C(O)OR^(a81), NR^(c81)C(O)NR^(c81)R^(d81), C(═NR^(e81))R^(b81), C(═NOH)R^(b81), C(═NCN)R^(b81), C(═NR^(e81))NR^(c81)R^(d81), NR^(c81)C(═NR^(e81))NR^(c81)R^(d81) NR^(c81)C(═NOH)NR^(c81)R^(d81) NR^(c81)C(═NCN)NR^(c81)R^(d81) NR^(c81)C(═NR^(e81))R^(b81), NR^(c81)S(O)NR^(c81)R^(d81) NR^(c81)S(O)R^(b81), NR^(c81)S(O)₂R^(b81), NR^(c81)S(O)(═NR^(e81))R^(b81), NR^(c81)S(O)₂NR^(c81)R^(d81), S(O)R^(b81), S(O)NR^(c81)R^(d81), S(O)₂R^(b81), S(O)₂NR^(c81)R^(d81), OS(O)(═NR^(e81))R^(b81), OS(O)₂R^(b81), SF₅, P(O)R^(f8)R^(g98), OP(O)(OR^(h81))(OR^(i81)), P(O)(OR^(h81))(OR^(i81)), and BR^(j81)R^(k81), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl- of R^(8A) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8B) substituents;

each R^(a81), R^(b81), R^(c81) and R^(d81) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl- of R^(a81), R^(b81), R^(c81) and R^(d81) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8B) substituents;

or, any R^(c81) and R^(d81), attached to the same N atom, together with the N atom to which they are attached, form a 4-10 membered heterocycloalkyl group, wherein the 4-10 membered heterocycloalkyl group is optionally substituted with 1, 2, 3, or 4 independently selected R^(8B) substituents;

each R^(e81) is independently selected from H, OH, CN, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, and C₂₋₆ alkynyl;

each R^(f81) and R^(g81) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered hetereocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered hetereocycloalkyl)-C₁₋₆ alkyl-;

each R^(h81) and R^(i81) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered hetereocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered hetereocycloalkyl)-C₁₋₆ alkyl-;

each R^(j81) and R^(k81) is independently selected from OH, C₁₋₆ alkoxy, and C₁₋₆ haloalkoxy;

or any R^(j81) and R^(k81) attached to the same B atom, together with the B atom to which they are attached, form a 5- or 6-membered heterocycloalkyl group optionally substituted with 1, 2, 3, or 4 substituents independently selected from C₁₋₆ alkyl and C₁₋₆ haloalkyl;

each R^(8B) is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-, CN, NO₂, OR^(a82), SR^(a82), NHOR^(a82), C(O)R^(b82), C(O)NR^(c82)R^(d82), C(O)NR^(c82)(OR^(a82)), C(O)OR^(a82), OC(O)R^(b82), OC(O)NR^(c82)R^(d82), NR^(c82)R^(d82) NR^(c82)NR^(c82)R^(d82), NR^(c82)C(O)R^(b82), NR^(c82)C(O)OR^(a82), NR^(c82)C(O)NR^(c82)R^(d82), C(═NR^(e82))R^(b82), C(═NOH)R^(b82), C(═NCN)R^(b82), C(═NR^(e82))NR^(c82)R^(d82), NR^(c82)C(═NR^(e82))NR^(c82)R^(d82) NR^(c82)C(═NOH)NR^(c82)R^(d82), NR^(c82)C(═NCN)NR^(c82)R^(a82), NR^(c82)C(═NR^(e82))R^(b82), NR^(c82)S(O)NR^(c82)R^(d82) NR^(c82)S(O)R^(b82), NR^(c82)S(O)₂R^(b82), NR^(c82)S(O)(═NR^(e82))R^(b82), NR^(c82)S(O)₂NR^(c82)R^(d82), S(O)R^(b82) S(O)NR^(c82)R^(d82), S(O)₂R^(b82), S(O)₂NR^(c82)R^(d82), OS(O)(═NR^(e82))R^(b82), OS(O)₂R^(b82), SF₅, P(O)R^(f82)R^(g82), OP(O)(OR^(h82))(OR^(i82)), P(O)(OR^(h82))(OR^(i82)), and BR^(i82)R^(k82), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl- of R^(8B) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8C) substituents;

each R^(a82), R^(b82), R^(c82), and R^(d82) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl- of R^(a82), R^(b82), R^(c82) and R^(d82) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8C) substituents;

or, any R^(c82) and R^(d82), attached to the same N atom, together with the N atom to which they are attached, form a 4-, 5-, 6-, or 7-membered heterocycloalkyl group, wherein the 4-, 5-, 6-, or 7-membered heterocycloalkyl group is optionally substituted with 1, 2, 3, or 4 independently selected R^(8C) substituents;

each R^(e82) is independently selected from H, OH, CN, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, and C₂₋₆ alkynyl;

each R^(f82) and R^(g82) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-;

each R^(h82) and R^(i82) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-;

each R^(j82) and R^(k82) is independently selected from OH, C₁₋₆ alkoxy, and C₁₋₆ haloalkoxy;

or any R^(j82) and R^(k82) attached to the same B atom, together with the B atom to which they are attached, form a 5- or 6-membered heterocycloalkyl group optionally substituted with 1, 2, 3, or 4 substituents independently selected from C₁₋₆ alkyl and C₁₋₆ haloalkyl;

each R^(8C) is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₆ alkyl-, C₃₋₇ cycloalkyl-C₁₋₆ alkyl-, (5-6 membered heteroaryl)-C₁₋₆ alkyl-, (4-7 membered heterocycloalkyl)-C₁₋₆ alkyl-, CN, NO₂, OR^(a83), SR^(a83), NHOR^(a83), C(O)R^(b83)C(O)NR^(c83)R^(d83), C(O)NR^(c83)(OR^(a83)), C(O)OR^(a83), OC(O)R^(b83), OC(O)NR^(c83)R^(d83), NR^(c83)R^(d83), NR^(c83)NR^(c83)R^(d83), NR^(c83)C(O)R^(b83), NR^(c83)C(O)OR^(a83), NR^(c83)C(O)NR^(c83)R^(d83), C(═NR^(e83))R^(b83), C(═NOH)R^(b83), C(═NCN)R^(b83), C(═NR^(e83))NR^(c83)R^(d83), NR^(c83)C(═NR^(e83))NR^(c83)R^(d83) NR^(c83)C(═NOH)NR^(c83)R^(d83), NR^(c83)C(═NCN)NR^(c83)R^(d83), NR^(c83)C(═NR^(e83))R^(b83), NR^(c83)S(O)NR^(c83)R^(d83) NR^(c83)S(O)R^(b83), NR^(c83)S(O)₂R^(b83), NR^(c83)S(O)(═NR^(e83))R^(b83), NR^(c83)S(O)₂NR^(c83)R^(d83), S(O)R^(b83) S(O)NR^(c83)R^(d83), S(O)₂R^(b83), S(O)₂NR^(c83)R^(d83), OS(O)(═NR^(e83))R^(b83), OS(O)₂R^(b83), SF₅, P(O)R^(f83)R^(g83), OP(O)(OR^(h83))(OR^(i83)), P(O)(OR^(h83))(OR^(i83)), and BR^(j83)R^(k83), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₆ alkyl-, C₃₋₇ cycloalkyl-C₁₋₆ alkyl-, (5-6 membered heteroaryl)-C₁₋₆ alkyl-, and (4-7 membered heterocycloalkyl)-C₁₋₆ alkyl- of R^(8C) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8D) substituents;

each R^(a83), R^(b83), R^(c83), and R^(d83) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₆ alkyl-, C₃₋₇ cycloalkyl-C₁₋₆ alkyl-, (5-6 membered heteroaryl)-C₁₋₆ alkyl-, and (4-7 membered heterocycloalkyl)-C₁₋₆ alkyl-, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₆ alkyl-, C₃₋₇ cycloalkyl-C₁₋₆ alkyl-, (5-6 membered heteroaryl)-C₁₋₆ alkyl-, and (4-7 membered heterocycloalkyl)-C₁₋₆ alkyl- of R^(a83), R^(b83), R^(c83) and R^(d83) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8D) substituents;

or, any R^(c83) and R^(d83), attached to the same N atom, together with the N atom to which they are attached, form a 4-, 5-, 6-, or 7-membered heterocycloalkyl group, wherein the 4-, 5-, 6-, or 7-membered heterocycloalkyl group is optionally substituted with 1, 2, 3, or 4 independently selected R^(8D) substituents;

each R^(e83) is independently selected from H, OH, CN, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, and C₂₋₆ alkynyl;

each R^(f83) and R^(g83) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₆ alkyl-, C₃₋₇ cycloalkyl-C₁₋₆ alkyl-, (5-6 membered heteroaryl)-C₁₋₆ alkyl-, and (4-7 membered heterocycloalkyl)-C₁₋₆ alkyl-;

each R^(h83) and R^(i83) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₆ alkyl-, C₃₋₇ cycloalkyl-C₁₋₆ alkyl-, (5-6 membered heteroaryl)-C₁₋₆ alkyl-, and (4-7 membered heterocycloalkyl)-C₁₋₆ alkyl-;

each R^(j83) and R^(k83) is independently selected from OH, C₁₋₆ alkoxy, and C₁₋₆ haloalkoxy;

or any R^(j83) and R^(k83) attached to the same B atom, together with the B atom to which they are attached, form a 5- or 6-membered heterocycloalkyl group optionally substituted with 1, 2, 3, or 4 substituents independently selected from C₁₋₆ alkyl and C₁₋₆ haloalkyl; and

each R^(8D) is independently selected from OH, NO₂, CN, halo, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, cyano-C₁₋₆ alkyl, HO—C₁₋₆ alkyl, C₁₋₆ alkoxy-C₁₋₆ alkyl, C₃₋₅ cycloalkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkoxy, amino, C₁₋₆ alkylamino, di(C₁₋₆ alkyl)amino, thio, C₁₋₆ alkylthio, C₁₋₆ alkylsulfinyl, C₁₋₆ alkylsulfonyl, carbamyl, C₁₋₆ alkylcarbamyl, di(C₁₋₆ alkyl)carbamyl, carboxy, C₁₋₆ alkylcarbonyl, C₁₋₄ alkoxycarbonyl, C₁₋₆ alkylcarbonylamino, C₁₋₆ alkoxycarbonylamino, C₁₋₆ alkylcarbonyloxy, aminocarbonyloxy, C₁₋₆ alkylaminocarbonyloxy, di(C₁₋₆ alkyl)aminocarbonyloxy, C₁₋₆ alkylsulfonylamino, aminosulfonyl, C₁₋₆ alkylaminosulfonyl, di(C₁₋₆ alkyl)aminosulfonyl, aminosulfonylamino, C₁₋₆ alkylaminosulfonylamino, di(C₁₋₆ alkyl)aminosulfonylamino, aminocarbonylamino, C₁₋₆ alkylaminocarbonylamino, and di(C₁₋₆ alkyl)aminocarbonylamino.

In some embodiments, X³ is CR³.

In some embodiments, X³ is N.

In some embodiments, R³ is selected from H, D, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ alkoxy, C₁₋₆ haloalkoxy, cyano-C₁₋₃ alkyl, HO—C₁₋₃ alkyl, C₁₋₃ alkoxy-C₁₋₃ alkyl, C₁₋₃ alkylamino, and di(C₁₋₃ alkyl)amino.

In some embodiments, R³ is selected from H, D, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ alkoxy, and C₁₋₆ haloalkoxy.

In some embodiments, R³ is H or C₁₋₆ alkyl.

In some embodiments, R³ is H.

In some embodiments, R¹ is selected from H, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, and C₁₋₆ haloalkyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, and C₁₋₆ haloalkyl of R¹ are each optionally substituted with 1, 2, 3, or 4 independently selected R^(1A) substituents.

In some embodiments, R¹ is selected from H, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, and C₁₋₆ haloalkyl.

In some embodiments, R¹ is H or C₁₋₆ alkyl.

In some embodiments, R¹ is H.

In some embodiments, R² is selected from H, D, halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, CN, NO₂, OR^(a2), NHOR^(a2), C(O)R^(b2), C(O)NR^(c2)R^(d2), C(O)NR^(c2)(OR^(a2)), C(O)OR^(a2), NR^(c2)R^(d2), NR^(c2)C(O)R^(b2), NR^(c2)C(O)OR^(a2), NR^(c2)C(O)NR^(c2)R^(d2), NR^(c2)S(O)₂R^(b2), NR^(c2)S(O)₂NR^(c2)R^(d2), S(O)₂R^(b2), and S(O)₂NR^(c2)R^(d2), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl of R² are each optionally substituted with 1, 2, 3, or 4 independently selected R^(2A) substituents; each R^(a2), R^(b2), R^(c2), and R^(d2) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl of R^(a2), R^(b2), R^(c2), and R^(d2) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(2A) substituents; and each R^(2A) is independently selected from D, OH, CN, halo, C₁₋₃ alkyl, C₂₋₃ alkenyl, C₂₋₃ alkynyl, C₁₋₃ haloalkyl, C₁₋₃ alkoxy, C₁₋₃ haloalkoxy, amino, C₁₋₃ alkylamino, and di(C₁₋₃ alkyl)amino.

In some embodiments, R² is selected from H, D, halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, and CN, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl of R² are each optionally substituted with 1 or 2 independently selected R^(2A) substituents; and each R^(2A) is independently selected from D, OH, CN, halo, C₁₋₃ alkyl, C₂₋₃ alkenyl, C₂₋₃ alkynyl, C₁₋₃ haloalkyl, C₁₋₃ alkoxy, C₁₋₃ haloalkoxy, amino, C₁₋₃ alkylamino, and di(C₁₋₃ alkyl)amino.

In some embodiments, R² is selected from H, D, halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl of R² are each optionally substituted with 1 or 2 independently selected R^(2A) substituents; and each R^(2A) is independently selected from D, OH, CN, halo, C₁₋₃ alkyl, C₂₋₃ alkenyl, C₂₋₃ alkynyl, C₁₋₃ haloalkyl, C₁₋₃ alkoxy, C₁₋₃ haloalkoxy, amino, C₁₋₃ alkylamino, and di(C₁₋₃ alkyl)amino.

In some embodiments, R² is selected from H, D, halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, and CN, wherein the C₁₋₆ alkyl of R² is optionally substituted with 1 or 2 independently selected R^(2A) substituents; and each R^(2A) is independently selected from OH, CN, halo, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, cyano-C₁₋₆ alkyl, HO—C₁₋₆ alkyl, C₁₋₆ alkoxy-C₁₋₆ alkyl, C₃₋₅ cycloalkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkoxy, amino, C₁₋₆ alkylamino, di(C₁₋₆ alkyl)amino, thio, C₁₋₆ alkylthio, C₁₋₆ alkylsulfinyl, C₁₋₆ alkylsulfonyl, carbamyl, C₁₋₆ alkylcarbamyl, di(C₁₋₆ alkyl)carbamyl, carboxy, C₁₋₆ alkylcarbonyl, C₁₋₄ alkoxycarbonyl, C₁₋₆ alkylcarbonylamino, C₁₋₆ alkoxycarbonylamino, C₁₋₆ alkylcarbonyloxy, aminocarbonyloxy, C₁₋₆ alkylaminocarbonyloxy, di(C₁₋₆ alkyl)aminocarbonyloxy, C₁₋₆ alkylsulfonylamino, aminosulfonyl, C₁₋₆ alkylaminosulfonyl, di(C₁₋₆ alkyl)aminosulfonyl, aminosulfonylamino, C₁₋₆ alkylaminosulfonylamino, di(C₁₋₆ alkyl)aminosulfonylamino, aminocarbonylamino, C₁₋₆ alkylaminocarbonylamino, and di(C₁₋₆ alkyl)aminocarbonylamino.

In some embodiments, R² is selected from H, D, halo, C₁₋₆ alkyl, and C₁₋₆ haloalkyl, wherein the C₁₋₆ alkyl of R² is optionally substituted with 1 or 2 independently selected R^(2A) substituents; and each R^(2A) is independently selected from OH, CN, halo, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, cyano-C₁₋₆ alkyl, HO—C₁₋₆ alkyl, C₁₋₆ alkoxy-C₁₋₆ alkyl, C₃₋₅ cycloalkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkoxy, amino, C₁₋₆ alkylamino, di(C₁₋₆ alkyl)amino, thio, C₁₋₆ alkylthio, C₁₋₆ alkylsulfinyl, C₁₋₆ alkylsulfonyl, carbamyl, C₁₋₆ alkylcarbamyl, di(C₁₋₆ alkyl)carbamyl, carboxy, C₁₋₆ alkylcarbonyl, C₁₋₄ alkoxycarbonyl, C₁₋₆ alkylcarbonylamino, C₁₋₆ alkoxycarbonylamino, C₁₋₆ alkylcarbonyloxy, aminocarbonyloxy, C₁₋₆ alkylaminocarbonyloxy, di(C₁₋₆ alkyl)aminocarbonyloxy, C₁₋₆ alkylsulfonylamino, aminosulfonyl, C₁₋₆ alkylaminosulfonyl, di(C₁₋₆ alkyl)aminosulfonyl, aminosulfonylamino, C₁₋₆ alkylaminosulfonylamino, di(C₁₋₆ alkyl)aminosulfonylamino, aminocarbonylamino, C₁₋₆ alkylaminocarbonylamino, and di(C₁₋₆ alkyl)aminocarbonylamino.

In some embodiments, R² is selected from H, C₁₋₆ alkyl, and CN, wherein the C₁₋₆ alkyl, is optionally substituted with 1 or 2 OH groups.

In some embodiments, R² is selected from H and C₁₋₆ alkyl, wherein the C₁₋₆ alkyl is optionally substituted with 1 or 2 OH groups.

In some embodiments, R² is selected from H, CN, and hydroxymethyl.

In some embodiments, R² is H or hydroxymethyl.

In some embodiments, R² is H.

In some embodiments, R² is CN.

In some embodiments, R² is hydroxymethyl.

In some embodiments, Cy¹ is selected from C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, and 5-10 membered heteroaryl, wherein the C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, and 5-10 membered heteroaryl are each optionally substituted with 1, 2, 3, or 4 independently selected R⁷ substituents; each R⁷ is independently selected from D, halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, CN, NO₂, OR^(a7), NHOR^(a7), C(O)R^(b7), C(O)NR^(c7)R^(d7), C(O)NR^(c7)(OR^(a7)), C(O)OR^(a7), NR^(c7)R^(d7), NR^(c7)C(O)R^(b7), NR^(c7)C(O)OR^(a7), NR^(c7)C(O)NR^(c7)R^(d7), NR^(c7)S(O)₂R^(b7), NR^(c7)S(O)₂NR^(c7)R^(d7), S(O)₂R^(b7), and S(O)₂NR^(c7)R^(d7), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl of R⁷ are each optionally substituted with 1, 2, 3, or 4 independently selected R^(7A) substituents; each R^(a7), R^(b7), R^(c7), and R^(d7) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl are each optionally substituted with 1, 2, 3, or 4 independently selected R^(7A) substituents; and each R^(7A) is independently selected from OH, NO₂, CN, halo, C₁₋₃ alkyl, C₂₋₃ alkenyl, C₂₋₃ alkynyl, C₁₋₃ haloalkyl, C₁₋₃ alkoxy, C₁₋₃ haloalkoxy, amino, C₁₋₃ alkylamino, and di(C₁₋₃ alkyl)amino.

In some embodiments, Cy¹ is selected from phenyl, C₃₋₆ cycloalkyl, and 5-6 membered heteroaryl, wherein the phenyl, C₃₋₆ cycloalkyl, and 5-6 membered heteroaryl of Cy¹ are each optionally substituted with 1, 2, 3, or 4 independently selected R⁷ substituents; each R⁷ is independently selected from D, halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, CN, NO₂, OR^(a7), NHOR^(a7), C(O)R^(b7), C(O)NR^(c7)R^(d7), C(O)NR^(c7)(OR^(a7)), C(O)OR^(a7), NR^(c7)R^(d7), NR^(c7)C(O)R^(b7), NR^(c7)C(O)OR^(a7), NR^(c7)C(O)NR^(c7)R^(d7), NR^(c7)S(O)₂R^(b7), NR^(c7)S(O)₂NR^(c7)R^(d7), S(O)₂R^(b7), and S(O)₂NR^(c7)R^(d7), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl of R⁷ are each optionally substituted with 1, 2, 3, or 4 independently selected R^(7A) substituents; each R^(a7), R^(b7), R^(c7), and R^(d7) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl are each optionally substituted with 1, 2, 3, or 4 independently selected R^(7A) substituents; and each R^(7A) is independently selected from OH, NO₂, CN, halo, C₁₋₃ alkyl, C₂₋₃ alkenyl, C₂₋₃ alkynyl, C₁₋₃ haloalkyl, C₁₋₃ alkoxy, C₁₋₃ haloalkoxy, amino, C₁₋₃ alkylamino, and di(C₁₋₃ alkyl)amino.

In some embodiments, Cy¹ is selected from phenyl, C₃₋₆ cycloalkyl, and 5-6 membered heteroaryl, wherein the phenyl, C₃₋₆ cycloalkyl, and 5-6 membered heteroaryl are each optionally substituted with 1, 2, 3, or 4 independently selected R⁷ substituents.

In some embodiments, Cy¹ is phenyl which is optionally substituted with 1, 2, 3, or 4 independently selected R⁷ substituents.

In some embodiments, Cy¹ is phenyl which is optionally substituted with 1 or 2 independently selected R⁷ substituents; and

each R⁷ is independently selected from D, halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, CN, OH, amino, C₁₋₃ alkylamino, and di(C₁₋₃ alkyl)amino.

In some embodiments, Cy¹ is phenyl which is optionally substituted with 1 or 2 independently selected R⁷ substituents; and

each R⁷ is independently selected from D, CN, halo, and CH₃.

In some embodiments, each R⁷ is independently selected from D, halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, CN, NO₂, OR^(a7), NHOR^(a7), C(O)R^(b7), C(O)NR^(c7)R^(d7), C(O)NR^(c7)(OR^(a7)), C(O)OR^(a7), NR^(c7)R^(d7), NR^(c7)C(O)R^(b7), NR^(c7)C(O)OR^(a7), NR^(c7)C(O)NR^(c7)R^(d7), NR^(c7)S(O)₂R^(b7), NR^(c7)S(O)₂NR^(c7)R^(d7), S(O)₂R^(b7), and S(O)₂NR^(c7)R^(d7), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl of R⁷ are each optionally substituted with 1, 2, 3, or 4 independently selected R^(7A) substituents; each R^(a7), R^(b7), R^(c7), and R^(d7) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl are each optionally substituted with 1, 2, 3, or 4 independently selected R^(7A) substituents; and each R^(7A) is independently selected from OH, NO₂, CN, halo, C₁₋₃ alkyl, C₂₋₃ alkenyl, C₂₋₃ alkynyl, C₁₋₃ haloalkyl, C₁₋₃ alkoxy, C₁₋₃ haloalkoxy, amino, C₁₋₃ alkylamino, and di(C₁₋₃ alkyl)amino.

In some embodiments, each R⁷ is independently selected from D, halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, CN, OH, amino, C₁₋₃ alkylamino, and di(C₁₋₃ alkyl)amino.

In some embodiments, each R⁷ is independently selected from D, CN, halo, and CH₃.

In some embodiments, Cy¹ is cyanophenyl.

In some embodiments, Cy¹ is 3-cyanophenyl, wherein the 3-cyanophenyl is optionally substituted by one of F or CH₃.

In some embodiments, Cy¹ is 3-cyanophenyl.

In some embodiments, R⁴ is —C(O)NR⁵R⁶.

In some embodiments, R⁵ is selected from H, C₁₋₆ alkyl, and C₁₋₆ haloalkyl.

In some embodiments, R⁵ is H.

In some embodiments, R⁶ is selected from H, C₁₋₆ alkyl, and C₁₋₆ haloalkyl.

In some embodiments, R⁶ is C₁₋₆ alkyl.

In some embodiments, R⁵ and R⁶ are each H.

In some embodiments, R⁵ is H and R⁶ is C₁₋₆ alkyl.

In some embodiments, R⁵ and R⁶ are each C₁₋₆ alkyl.

In some embodiments, R⁵ is H and R⁶ is C₁₋₃ alkyl.

In some embodiments, R⁴ is —C(O)NHCH₃.

In some embodiments, R⁴ is -L-Cy⁴.

In some embodiments, L is selected from Y¹, C₁₋₆ alkylene, C₂₋₆ alkenylene, C₂₋₆ alkynylene, C₁₋₆ alkylene-Y¹, and Y¹—C₁₋₆ alkylene, wherein said alkylene linking group is optionally substituted with 1, 2, or 3 independently selected R^(8D) substituents and optionally substituted with 1 R⁸ substituent.

In some embodiments, L is selected from Y¹, C₁₋₆ alkylene, and Y¹—C₁₋₆ alkylene, wherein said alkylene linking group is optionally substituted with 1, 2, or 3 independently selected R^(8D) substituents and optionally substituted with 1 R⁸ substituent.

In some embodiments, L is Y¹ or C₁₋₆ alkylene, wherein said alkylene linking group is optionally substituted with 1, 2, or 3 independently selected R^(8D) substituents and optionally substituted with 1 R⁸ substituent.

In some embodiments, L is Y¹.

In some embodiments, L is C₁₋₆ alkylene, which is optionally substituted with 1, 2, or 3 independently selected R^(8D) substituents and optionally substituted with 1 R⁸ substituent.

In some embodiments, L is C₁₋₆ alkylene-Y¹, wherein said alkylene linking group is optionally substituted with 1, 2, or 3 independently selected R^(8D) substituents and optionally substituted with 1 R⁸ substituent.

In some embodiments, L is Y¹—C₁₋₆ alkylene, wherein said alkylene linking group is optionally substituted with 1, 2, or 3 independently selected R^(8D) substituents and optionally substituted with 1 R⁸ substituent.

In some embodiments, each Y¹ is independently selected from —C(O)—, —C(O)NR^(Y)—, —NR^(Y)—, —NR^(Y)C(O)—, —NR^(Y)C(O)O—, —NR^(Y)C(O)NR^(Y)—, —NR^(Y)S(O)₂—, —S(O)₂—, —S(O)₂NR^(Y)—, and —NR^(Y)S(O)₂NR^(Y)—.

In some embodiments, each Y¹ is —NR^(Y)—.

In some embodiments, each R^(Y) is independently selected from H, C₁₋₆ alkyl, and C₁₋₆ haloalkyl.

In some embodiments, each R^(Y) is independently selected from H and C₁₋₆ alkyl.

In some embodiments, each R^(Y) is H.

In some embodiments, L is —NH—.

In some embodiments, L is selected from —NR^(Y)—, C₁₋₃ alkylene, C₁₋₃ hydroxyalkylene, and C₁₋₃ aminoalkylene.

In some embodiments, L is selected from —NH—, —CH₂—, —CH(OH)—, —CH(NH₂)—, —CH₂—NH—, and —NH—CH₂—.

In some embodiments, L is selected from —NH—, —CH₂—, —CH(OH)—, and —CH(NH₂)—.

In some embodiments, L is —CH₂—.

In some embodiments, L is —CH₂—CH₂—NH—.

In some embodiments, L is —CH₂—NH—.

In some embodiments, L is —NH—CH₂—CH₂—.

In some embodiments, L is —NH—CH₂—.

In some embodiments, Cy⁴ is selected from phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl, each of which is optionally substituted with 1, 2, 3, 4, or 5 substituents independently selected from R^(8D) and R⁸.

In some embodiments, Cy⁴ is selected from phenyl, 5-6 membered heteroaryl, and 4-6 membered heterocycloalkyl, wherein the phenyl, 5-6 membered heteroaryl, and 4-6 membered heterocycloalkyl are each optionally substituted with 1, 2, 3, 4, or 5 independently selected R⁸ substituents; and

each R⁸ is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₆ cycloalkyl, 5-6 membered heteroaryl, 4-6 membered heterocycloalkyl, CN, NO₂, amino, C₁₋₃ alkylamino, and di(C₁₋₃ alkyl)amino, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₆ cycloalkyl, 5-6 membered heteroaryl, and 4-6 membered heterocycloalkyl of R⁸ are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8A) substituents; and each R^(8A) is independently selected from OH, NO₂, CN, halo, C₁₋₃ alkyl, C₂₋₃ alkenyl, C₂₋₃ alkynyl, C₁₋₃ haloalkyl, C₁₋₃ alkoxy, C₁₋₃ haloalkoxy, amino, C₁₋₃ alkylamino, and di(C₁₋₃ alkyl)amino.

In some embodiments, Cy⁴ is selected from phenyl, cyclohexyl, pyridyl, pyrrolidinonyl, and imidazolyl, wherein the phenyl, cyclohexyl, pyridyl, pyrrolidinonyl, and imidazolyl are each optionally substituted with 1, 2, 3, 4, or 5 substituents independently selected from R^(8D) and R⁸.

In some embodiments, Cy⁴ is selected from phenyl, cyclohexyl, pyridyl, pyrrolidinonyl, and imidazolyl, wherein the phenyl is optionally substituted with 1-methyl-1H-pyrazol-4-yl and the imidazolyl is substituted with methyl.

In some embodiments, each R^(8D) is independently selected from OH, CN, halo, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkoxy, amino, C₁₋₆ alkylamino, and di(C₁₋₆ alkyl)amino.

In some embodiments, each R^(8D) is halo.

In some embodiments, each R^(8D) is fluoro.

In some embodiments, each R⁸ is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl, CN, NO₂, OR^(a8), NHOR^(a8), C(O)R^(b8), C(O)NR^(c8)R^(d8), C(O)NR^(c8)(OR^(a8)), C(O)OR^(a8), NR^(c8)R^(d8), NR^(c8)C(O)R^(b8), NR^(c8)C(O)OR^(a8), NR^(c8)C(O)NR^(c8)R^(d8), NR^(c8)S(O)₂R^(b8), NR^(c8)S(O)₂NR^(c8)R^(d8), S(O)₂R^(b8), and S(O)₂NR^(c8)R^(d8), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl of R⁸ are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8A) substituents.

In some embodiments, each R^(a8), R^(b8), R^(c8), and R^(d8) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8A) substituents.

In some embodiments, each R^(8A) is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl, CN, OR^(a81), SR^(a81), C(O)R^(b81), C(O)NR^(c81)R^(d81), C(O)OR^(a81), OC(O)R^(b81), OC(O)NR^(c81)R^(d81), NR^(c81)R^(d81), NR^(c81)C(O)R^(b81) NR^(c81)C(O)OR^(a81), NR^(c81)C(O)NR^(c81)R^(d81), NR^(c81)S(O)NR^(c81)R^(d81), NR^(c81)S(O)R^(b81), and NR^(c81)S(O)₂R^(b81), wherein the C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl of R^(8A) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8B) substituents.

In some embodiments, each R^(8A) is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, CN, OR^(a81), SR^(a81), C(O)R^(b81), C(O)NR^(c81)R^(d81), C(O)OR^(a81)OC(O)R^(b81), OC(O)NR^(c81)R^(d81), NR^(c81)R^(d81), NR^(c81)C(O)R^(b81), NR^(c81)C(O)OR^(a81), NR^(c81)C(O)NR^(c81)R^(d81), NR^(c81)S(O)NR^(c81)R^(d81), NR^(c81)S(O)R^(b81), NR^(c81)S(O)₂R^(b81), wherein the C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl of R^(8A) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8B) substituents.

In some embodiments, each R^(8A) is independently selected from halo, C₁₋₃ alkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, CN, OR^(a81), SR^(a81), C(O)R^(b81)C(O)NR^(c81)R^(d81), C(O)OR^(a81), OC(O)R^(b81), OC(O)NR^(c81)R^(d81), NR^(c81)R^(d81), NR^(c81)C(O)R^(b81)S NR^(c81)C(O)OR^(a81), and NR^(c81)C(O)NR^(c81)R^(d81), wherein the C₁₋₃ alkyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl of R^(8A) are each optionally substituted with 1, 2, or 3 independently selected R^(8B) substituents.

In some embodiments, each R^(a81), R^(b81), R^(c81) and R^(d81) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl of R^(a81), R^(b81), R^(c81) and R^(d81) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8B) substituents;

or, any R^(c81) and R^(d81), attached to the same N atom, together with the N atom to which they are attached, form a 4-10 membered heterocycloalkyl group, wherein the 4-10 membered heterocycloalkyl group is optionally substituted with 1, 2, 3, or 4 independently selected R^(8B) substituents.

In some embodiments, each R^(a81), R^(b81), R^(c81) and R^(d81) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl of R^(a81), R^(b81), R^(c81) and R^(d81) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8B) substituents.

In some embodiments, each R^(a81), R^(b81), R^(c81) and R^(d81) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, and 4-7 membered heterocycloalkyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, and 4-7 membered heterocycloalkyl of R^(a81), R^(b81), R^(c81) and R^(d81) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8B) substituents;

or, any R^(c81) and R^(d81), attached to the same N atom, together with the N atom to which they are attached, form a 4-10 membered heterocycloalkyl group, wherein the 4-10 membered heterocycloalkyl group is optionally substituted with 1, 2, 3, or 4 independently selected R^(8B) substituents.

In some embodiments, each R^(a81), R^(b81), R^(c81), and R^(d81) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl of R^(a81), R^(b81), R^(c81) and R^(d81) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8B) substituents.

In some embodiments, each R^(8A) is independently selected from OH, NO₂, CN, halo, C₁₋₃ alkyl, C₂₋₃ alkenyl, C₂₋₃ alkynyl, C₁₋₃ haloalkyl, C₁₋₃ alkoxy, C₁₋₃ haloalkoxy, amino, C₁₋₃ alkylamino, and di(C₁₋₃ alkyl)amino.

In some embodiments, each R^(8B) is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, CN, OR^(a82), SR^(a82), C(O)R^(b82), C(O)NR^(c82)R^(d82), C(O)OR^(a82), OC(O)R^(b82), OC(O)NR^(c82)R^(d82), NR^(c82)R^(d82), NR^(c82)NR^(c82)R^(d82), NR^(c82)C(O)R^(b82), NR^(c82)C(O)OR^(a82), NR^(c82)C(O)NR^(c82)R^(d82), NR^(c82)S(O)₂R^(b82), NR^(c82)S(O)₂NR^(c82)R^(d82), S(O)₂R^(b82), and S(O)₂NR^(c82)R^(d82), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl of R^(8B) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8C) substituents.

In some embodiments, each R^(a82), R^(b82), R^(C82), and R^(d82) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl of R^(a82), R^(b82), R^(c82) and R^(d82) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8C) substituents.

In some embodiments, each R^(8C) is independently selected from OH, CN, halo, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, cyano-C₁₋₆ alkyl, HO—C₁₋₆ alkyl, C₁₋₆ alkoxy-C₁₋₆ alkyl, C₃₋₅ cycloalkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkoxy, amino, C₁₋₆ alkylamino, di(C₁₋₆ alkyl)amino, thio, C₁₋₆ alkylthio, C₁₋₆ alkylsulfinyl, C₁₋₆ alkylsulfonyl, carbamyl, C₁₋₆ alkylcarbamyl, di(C₁₋₆ alkyl)carbamyl, carboxy, C₁₋₆ alkylcarbonyl, C₁₋₄ alkoxycarbonyl, C₁₋₆ alkylcarbonylamino, C₁₋₆ alkoxycarbonylamino, C₁₋₆ alkylcarbonyloxy, aminocarbonyloxy, C₁₋₆ alkylaminocarbonyloxy, di(C₁₋₆ alkyl)aminocarbonyloxy, C₁₋₆ alkylsulfonylamino, aminosulfonyl, C₁₋₆ alkylaminosulfonyl, di(C₁₋₆ alkyl)aminosulfonyl, aminosulfonylamino, C₁₋₆ alkylaminosulfonylamino, di(C₁₋₆ alkyl)aminosulfonylamino, aminocarbonylamino, C₁₋₆ alkylaminocarbonylamino, and di(C₁₋₆ alkyl)aminocarbonylamino.

In some embodiments, each R^(8C) is independently selected from OH, CN, halo, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, cyano-C₁₋₆ alkyl, HO—C₁₋₆ alkyl, C₁₋₆ alkoxy-C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkoxy, amino, C₁₋₆ alkylamino, di(C₁₋₆ alkyl)amino, and carboxy.

In some embodiments, each R^(8C) is independently selected from OH, CN, halo, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, cyano-C₁₋₆ alkyl, HO—C₁₋₆ alkyl, C₁₋₆ alkoxy-C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkoxy, amino, C₁₋₆ alkylamino, and di(C₁₋₆ alkyl)amino.

In some embodiments:

R¹ is selected from H, C₁₋₆ alkyl, and C₁₋₆ haloalkyl;

R² is selected from H, D, halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-, CN, NO₂, OR^(a2), NHOR^(a2), C(O)R^(b2), C(O)NR^(c2)R^(d2), C(O)NR^(c2)(OR^(a2)), C(O)OR^(a2), NR^(c2)R^(d2), NR^(c2)C(O)R^(b2), NR^(c2)C(O)OR^(a2), NR^(c2)C(O)NR^(c2)R^(d2), NR^(c2)S(O)₂R^(b2), S(O)₂R^(b2), and S(O)₂NR^(c2)R^(d2), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl- of R² are each optionally substituted with 1, 2, 3, or 4 independently selected R^(2A) substituents;

each R^(a2), R^(b2), R^(c2), and R^(d2) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, and 4-10 membered heterocycloalkyl of R^(a2), R^(b2), R^(c2), and R^(d2) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(2A) substituents;

each R^(2A) is selected from H, D, halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, CN, NO₂, OR^(a21), NHOR^(a21), C(O)R^(b21), C(O)NR^(c21)R^(d21), C(O)NR^(c21)(OR^(a21)), C(O)OR^(a21), NR^(c21)R^(d21) NR^(c21)C(O)R^(b21), NR^(c21)C(O)OR^(a21), NR^(c21)C(O)NR^(c21)R^(d2)1l NR^(c21)S(O)₂R^(b21), NR^(c21)S(O)₂NR^(c21)R^(d2)1 S(O)₂R^(b21), and S(O)₂NR^(c21)R^(d21), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, and 4-10 membered heterocycloalkyl of R^(2A) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(2B) substituents;

each R^(a21), R^(b21), R^(c21) and R^(d21) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, and 4-10 membered heterocycloalkyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, and 4-10 membered heterocycloalkyl of R^(a21), R^(b21), R^(c21) and R^(d21) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(2B) substituents;

each R^(2B) is independently selected from OH, NO₂, CN, halo, C₁₋₃ alkyl, C₂₋₃ alkenyl, C₂₋₃ alkynyl, C₁₋₃ haloalkyl, cyano-C₁₋₃ alkyl, HO—C₁₋₃ alkyl, C₁₋₃ alkoxy-C₁₋₃ alkyl, C₃₋₅ cycloalkyl, C₁₋₃ alkoxy, C₁₋₃ haloalkoxy, amino, C₁₋₃ alkylamino, di(C₁₋₃ alkyl)amino, thio, C₁₋₃ alkylthio, C₁₋₃ alkylsulfinyl, C₁₋₃ alkylsulfonyl, carbamyl, C₁₋₃ alkylcarbamyl, di(C₁₋₃ alkyl)carbamyl, carboxy, C₁₋₃ alkylcarbonyl, C₁₋₄ alkoxycarbonyl, C₁₋₃ alkylcarbonylamino, C₁₋₃ alkoxycarbonylamino, C₁₋₃ alkylcarbonyloxy, aminocarbonyloxy, C₁₋₃ alkylaminocarbonyloxy, di(C₁₋₃ alkyl)aminocarbonyloxy, C₁₋₃ alkylsulfonylamino, aminosulfonyl, C₁₋₃ alkylaminosulfonyl, di(C₁₋₃ alkyl)aminosulfonyl, aminosulfonylamino, C₁₋₃ alkylaminosulfonylamino, di(C₁₋₃ alkyl)aminosulfonylamino, aminocarbonylamino, C₁₋₃ alkylaminocarbonylamino, and di(C₁₋₃ alkyl)aminocarbonylamino;

X³ is N or CR³;

R³ is selected from H, D, halo, OH, CN, NO₂, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ alkoxy, C₁₋₆ haloalkoxy, cyano-C₁₋₃ alkyl, HO—C₁₋₃ alkyl, C₁₋₃ alkoxy-C₁₋₃ alkyl, C₃₋₅ cycloalkyl, amino, C₁₋₃ alkylamino, di(C₁₋₃ alkyl)amino, thio, C₁₋₃ alkylthio, C₁₋₃ alkylsulfinyl, C₁₋₃ alkylsulfonyl, carbamyl, C₁₋₃ alkylcarbamyl, di(C₁₋₃ alkyl)carbamyl, carboxy, C₁₋₃ alkylcarbonyl, C₁₋₄ alkoxycarbonyl, C₁₋₃ alkylcarbonylamino, C₁₋₃ alkoxycarbonylamino, C₁₋₃ alkylcarbonyloxy, aminocarbonyloxy, C₁₋₃ alkylaminocarbonyloxy, di(C₁₋₃ alkyl)aminocarbonyloxy, C₁₋₃ alkylsulfonylamino, aminosulfonyl, C₁₋₃ alkylaminosulfonyl, di(C₁₋₃ alkyl)aminosulfonyl, aminosulfonylamino, C₁₋₃ alkylaminosulfonylamino, di(C₁₋₃ alkyl)aminosulfonylamino, aminocarbonylamino, C₁₋₃ alkylaminocarbonylamino, and di(C₁₋₃ alkyl)aminocarbonylamino;

Cy¹ is selected from C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, and 4-10 membered heterocycloalkyl, wherein the C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, and 4-10 membered heterocycloalkyl are each optionally substituted with 1, 2, 3, or 4 independently selected R⁷ substituents;

each R⁷ is selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, CN, NO₂, OR^(a7), NHOR^(a7), C(O)R^(b7), C(O)NR^(c7)R^(d7), C(O)NR^(c7)(OR^(a7)), C(O)OR^(a7), NR^(c7)R^(d7), NR^(c7)NR^(c7)R^(d7), NR^(c7)C(O)R^(b7), NR^(c7)C(O)OR^(a7), NR^(c7)C(O)NR^(c7)R^(d7), NR^(c7)S(O)₂R^(b7), NR^(c7)S(O)₂NR^(c7)R^(d7), S(O)₂R^(b7), and S(O)₂NR^(c7)R^(d7), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, and 4-10 membered heterocycloalkyl of R⁷ are each optionally substituted with 1, 2, 3, or 4 independently selected R^(7A) substituents;

each R^(a7), R^(b7), R^(c7), and R^(d7) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, and 4-10 membered heterocycloalkyl of R^(a7), R^(b7), R^(c7) and R^(d7) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(7A) substituents;

each R^(7A) is independently selected from OH, NO₂, CN, halo, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, cyano-C₁₋₆ alkyl, HO—C₁₋₆ alkyl, C₁₋₆ alkoxy-C₁₋₆ alkyl, C₃₋₅ cycloalkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkoxy, amino, C₁₋₆ alkylamino, di(C₁₋₆ alkyl)amino, thio, C₁₋₆ alkylthio, C₁₋₆ alkylsulfinyl, C₁₋₆ alkylsulfonyl, carbamyl, C₁₋₆ alkylcarbamyl, di(C₁₋₆ alkyl)carbamyl, carboxy, C₁₋₆ alkylcarbonyl, C₁₋₄ alkoxycarbonyl, C₁₋₆ alkylcarbonylamino, C₁₋₆ alkoxycarbonylamino, C₁₋₆ alkylcarbonyloxy, aminocarbonyloxy, C₁₋₆ alkylaminocarbonyloxy, di(C₁₋₆ alkyl)aminocarbonyloxy, C₁₋₆ alkylsulfonylamino, aminosulfonyl, C₁₋₆ alkylaminosulfonyl, di(C₁₋₆ alkyl)aminosulfonyl, aminosulfonylamino, C₁₋₆ alkylaminosulfonylamino, di(C₁₋₆ alkyl)aminosulfonylamino, aminocarbonylamino, C₁₋₆ alkylaminocarbonylamino, and di(C₁₋₆ alkyl)aminocarbonylamino;

R⁴ is selected from —C(O)NR⁵R⁶ and -L-Cy⁴;

L is selected from Y¹, C₁₋₆ alkylene, C₂₋₆ alkenylene, C₂₋₆ alkynylene, C₁₋₆ alkylene-Y¹, Y¹—C₁₋₆ alkylene, C₁₋₆ alkylene-Y¹—C₁₋₆ alkylene, Y¹—C₁₋₆ alkylene-Y¹—, Y¹—C₁₋₆ alkylene-Y¹—C₁₋₆ alkylene, and C₁₋₆ alkylene-Y¹—C₁₋₆ alkylene-Y¹, wherein said alkylene, alkenylene, and alkynylene linking groups are each optionally substituted with 1, 2, or 3 substituents independently selected from R^(8D) and R⁸;

each Y¹ is selected from independently —O—, —S—, —C(O)—, —C(O)NR^(Y)—, —C(O)O—, —OC(O)—, —OC(O)NR^(Y)—, —NR^(Y)—, —NR^(Y)C(O)—, —NR^(Y)C(O)O—, —NR^(Y)C(O)NR^(Y)—, —NR^(Y)S(O)₂—, —S(O)₂—, —S(O)₂NR^(Y)—, and —NR^(Y)S(O)₂NR^(Y)—;

each R^(Y) is selected from H, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, and S(O)₂R^(b5), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, and 4-10 membered heterocycloalkyl of R^(Y) are each optionally substituted with 1, 2, 3, or 4 substituents independently selected from R^(8D) and R⁸;

Cy⁴ is selected from C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 4-10 membered heterocycloalkyl and 5-10 membered heteroaryl, wherein the C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 4-10 membered heterocycloalkyl and 5-10 membered heteroaryl, are each optionally substituted with 1, 2, 3, 4, or 5 substituents independently selected from R^(8D) and R⁸.

R⁵ and R⁶ are each independently selected from H, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, and S(O)₂R^(b5), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, and C₁₋₆ haloalkyl of R⁵ or R⁶ is optionally substituted with 1, 2, 3, or 4 substituents independently selected from R^(8D) and R⁸;

each R^(b5) is independently selected from C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₃₋₇ cycloalkyl, and 4-7 membered heterocycloalkyl;

each R⁸ is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl, CN, NO₂, OR^(a8), NHOR^(a8), C(O)R^(b8), C(O)NR^(c8)R^(d8), C(O)NR^(c8)(OR^(a8)), C(O)OR^(a8), NR^(c8)R^(d8), NR^(c8)C(O)R^(b8), NR^(c8)C(O)OR^(a8), NR^(c8)C(O)NR^(c8)R^(d8), NR^(c8)S(O)₂R^(b8), NR^(c8)S(O)₂NR^(c8)R^(d8), S(O)₂R^(b8), and S(O)₂NR^(c8)R^(d8), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl of R⁸ are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8A) substituents.

each R^(a8), R^(b8), R^(c8), and R^(d8) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8A) substituents;

each R^(8A) is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl, CN, OR^(a81), SR^(a81), C(O)R^(b81), C(O)NR^(c81)R^(d81), C(O)OR^(a81), OC(O)R^(b81), OC(O)NR^(c81)R^(d81), NR^(c81)R^(d81), NR^(c81)C(O)R^(b81), NR^(c81)C(O)OR^(a81), NR^(c81)C(O)NR^(c81)R^(d81) NR^(c81)S(O)NR^(c81)R^(d81), NR^(c81)S(O)R^(b81), and NR^(c81)S(O)₂R^(b81), wherein the C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl of R^(8A) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8B) substituents;

each R^(a81), R^(b81), R^(c81), and R^(a81) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl of R^(a81), R^(b81), R^(c81), and R^(d81) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8B) substituents;

or, any R^(c81) and R^(d81), attached to the same N atom, together with the N atom to which they are attached, form a 4-10 membered heterocycloalkyl group, wherein the 4-10 membered heterocycloalkyl group is optionally substituted with 1, 2, 3, or 4 independently selected R^(8B) substituents;

each R^(8B) is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, CN, OR^(a82), SR^(a82), C(O)R^(b82), C(O)NR^(c82)R^(d82), C(O)OR^(a82), OC(O)R^(b82), OC(O)NR^(c82)R^(a82), NR^(c82)R^(d82), NR^(c82)NR^(c82)R^(d82), NR^(c82)C(O)R^(b2), NR^(c82)C(O)OR^(a82), NR^(c82)C(O)NR^(c82)R^(d82), NR^(c82)S(O)₂R^(b2), NR^(c82)S(O)₂NR^(c82)R^(d82), S(O)₂R^(b82), and S(O)₂NR^(c82)R^(a82), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl of R^(8B) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8C) substituents;

each R^(a82), R^(b82), R^(c82), and R^(d82) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl of R^(a82), R^(b82), R^(c82) and R^(d82) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8C) substituents; and

each R^(8C) is independently selected from OH, CN, halo, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, cyano-C₁₋₆ alkyl, HO—C₁₋₆ alkyl, C₁₋₆ alkoxy-C₁₋₆ alkyl, C₃₋₅ cycloalkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkoxy, amino, C₁₋₆ alkylamino, di(C₁₋₆ alkyl)amino, thio, C₁₋₆ alkylthio, C₁₋₆ alkylsulfinyl, C₁₋₆ alkylsulfonyl, carbamyl, C₁₋₆ alkylcarbamyl, di(C₁₋₆ alkyl)carbamyl, carboxy, C₁₋₆ alkylcarbonyl, C₁₋₄ alkoxycarbonyl, C₁₋₆ alkylcarbonylamino, C₁₋₆ alkoxycarbonylamino, C₁₋₆ alkylcarbonyloxy, aminocarbonyloxy, C₁₋₆ alkylaminocarbonyloxy, di(C₁₋₆ alkyl)aminocarbonyloxy, C₁₋₆ alkylsulfonylamino, aminosulfonyl, C₁₋₆ alkylaminosulfonyl, di(C₁₋₆ alkyl)aminosulfonyl, aminosulfonylamino, C₁₋₆ alkylaminosulfonylamino, di(C₁₋₆ alkyl)aminosulfonylamino, aminocarbonylamino, C₁₋₆ alkylaminocarbonylamino, and di(C₁₋₆ alkyl)aminocarbonylamino.

In some embodiments, when -L-Cy⁴ is substituted by R⁸, L-Cy⁴ is substituted by either 1, 2, 3, or 4 independently selected R⁸ substituents.

In some embodiments:

R¹ is H;

R² is selected from H, D, halo, CN, C₁₋₆ alkyl, and C₁₋₆ haloalkyl, wherein the C₁₋₆ alkyl of R² is optionally substituted with 1 or 2 independently selected R^(2A) substituents; and

each R^(2A) is independently selected from OH, CN, halo, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, cyano-C₁₋₆ alkyl, HO—C₁₋₆ alkyl, C₁₋₆ alkoxy-C₁₋₆ alkyl, C₃₋₅ cycloalkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkoxy, amino, C₁₋₆ alkylamino, di(C₁₋₆ alkyl)amino, thio, C₁₋₆ alkylthio, C₁₋₆ alkylsulfinyl, C₁₋₆ alkylsulfonyl, carbamyl, C₁₋₆ alkylcarbamyl, di(C₁₋₆ alkyl)carbamyl, carboxy, C₁₋₆ alkylcarbonyl, C₁₋₄ alkoxycarbonyl, C₁₋₆ alkylcarbonylamino, C₁₋₆ alkoxycarbonylamino, C₁₋₆ alkylcarbonyloxy, aminocarbonyloxy, C₁₋₆ alkylaminocarbonyloxy, di(C₁₋₆ alkyl)aminocarbonyloxy, C₁₋₆ alkylsulfonylamino, aminosulfonyl, C₁₋₆ alkylaminosulfonyl, di(C₁₋₆ alkyl)aminosulfonyl, aminosulfonylamino, C₁₋₆ alkylaminosulfonylamino, di(C₁₋₆ alkyl)aminosulfonylamino, aminocarbonylamino, C₁₋₆ alkylaminocarbonylamino, and di(C₁₋₆ alkyl)aminocarbonylamino;

X³ is N or CR³;

R³ is selected from H, D, halo, OH, CN, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ alkoxy, C₁₋₆ haloalkoxy, cyano-C₁₋₃ alkyl, HO—C₁₋₃ alkyl, C₁₋₃ alkoxy-C₁₋₃ alkyl, amino, C₁₋₃ alkylamino, di(C₁₋₃ alkyl)amino, C₁₋₃ alkylsulfonyl, carbamyl, C₁₋₃ alkylcarbamyl, di(C₁₋₃ alkyl)carbamyl, C₁₋₃ alkylcarbonyl, C₁₋₃ alkylcarbonylaminoC₁₋₃ alkylsulfonylamino, aminosulfonyl, C₁₋₃ alkylaminosulfonyl, and di(C₁₋₃ alkyl)aminosulfonyl;

Cy¹ is selected from phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl, each of which is optionally substituted with 1, 2, 3, or 4 independently selected R⁷ substituents;

each R⁷ is independently selected from OH, CN, halo, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, cyano-C₁₋₆ alkyl, HO—C₁₋₆ alkyl, C₁₋₆ alkoxy-C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkoxy, amino, C₁₋₆ alkylamino, and di(C₁₋₆ alkyl)amino;

R⁴ is selected from —C(O)NR⁵R⁶ and -L-Cy⁴;

L is selected from Y¹, C₁₋₆ alkylene, C₁₋₆ alkylene-Y¹, and Y¹—C₁₋₆ alkylene, wherein said alkylene linking groups are optionally substituted with 1, 2, or 3 independently selected R^(8D) substituents and optionally substituted by 1 R⁸ substituent;

each Y¹ is independently selected from —O—, —S—, —C(O)—, —C(O)NR^(Y)—, —C(O)O—, —OC(O)—, —OC(O)NR^(Y)—, —NR^(Y)—, —NR^(Y)C(O)—, —NR^(Y)C(O)O—, —NR^(Y)C(O)NR^(Y)—, —NR^(Y)S(O)₂—, —S(O)₂—, —S(O)₂NR^(Y)—, and —NR^(Y)S(O)₂NR^(Y)—;

each R^(Y) is selected from H and C₁₋₆ alkyl;

Cy⁴ is selected from C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 4-10 membered heterocycloalkyl, and 5-10 membered heteroaryl, wherein the C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 4-10 membered heterocycloalkyl and 5-10 membered heteroaryl, are each optionally substituted with 1, 2, 3, 4, or 5 substituents independently selected from R^(8D) and R⁸;

R⁵ and R⁶ are each independently selected from H, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, and C₁₋₆ haloalkyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, and C₁₋₆ haloalkyl of R⁵ or R⁶ is optionally substituted with 1, 2, 3, or 4 substituents independently selected from R^(8D) and R⁸;

each R⁸ is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl, CN, NO₂, OR^(a8), NHOR^(a8), C(O)R^(b8), C(O)NR^(c8)R^(d8), C(O)NR^(c8)(OR^(a8)), C(O)OR^(a8), NR^(c8)R^(d8), NR^(c8)C(O)R^(b8), NR^(c8)C(O)OR^(a8), NR^(c8)C(O)NR^(c8)R^(d8), NR^(c8)S(O)₂R^(b8), NR^(c8)S(O)₂NR^(c8)R^(d8), S(O)₂R^(b8), and S(O)₂NR^(c8)R^(d8), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl of R⁸ are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8A) substituents.

each R^(a8), R^(b8), R^(c8), and R^(d8) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8A) substituents;

each R^(8A) is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl, CN, OR^(a81), SR^(a81), C(O)R^(b81), C(O)NR^(c81)R^(d81), C(O)OR^(a81), OC(O)R^(b81)OC(O)NR^(c81)R^(d81), NR^(c81)R^(d81), NR^(c81)C(O)R^(b81), NR^(c81)C(O)OR^(a81), NR^(c81)C(O)NR^(c81)R^(d81) NR^(c81)S(O)NR^(c81)R^(d81), NR^(c81)S(O)R^(b81), and NR^(c81)S(O)₂R^(b81), wherein the C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl of R^(8A) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8B) substituents;

each R^(a81), R^(b81), R^(c81) and R^(d81) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl of R^(a81), R^(b81), R^(c81) and R^(d81) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8B) substituents;

or, any R^(c81) and R^(d81), attached to the same N atom, together with the N atom to which they are attached, form a 4-10 membered heterocycloalkyl group, wherein the 4-10 membered heterocycloalkyl group is optionally substituted with 1, 2, 3, or 4 independently selected R^(8B) substituents;

each R^(8B) is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, 4-7 membered heterocycloalkyl, CN, OR^(a82), SR^(a82), C(O)R^(b82), C(O)NR^(c82)R^(d82), C(O)OR^(a82), OC(O)R^(b82), OC(O)NR^(c82)R^(d82), NR^(c82)R^(d82), NR^(c82)NR^(c82)R^(d82), NR^(c82)C(O)R^(b82) NR^(c82)C(O)OR^(a82), NR^(c82)C(O)NR^(c82)R^(d82), NR^(c82)S(O)₂R^(b82), NR^(c82)S(O)₂NR^(c82)R^(d82), S(O)₂R^(b82), and S(O)₂NR^(c82)R^(d82), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl of R^(8B) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8C) substituents;

each R^(a82), R^(b82), R^(c82), and R^(d82) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl of R^(a82), R^(b82), R^(c82) and R^(d82) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8C) substituents;

each R^(8C) is independently selected from OH, CN, halo, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, cyano-C₁₋₆ alkyl, HO—C₁₋₆ alkyl, C₁₋₆ alkoxy-C₁₋₆ alkyl, C₃₋₅ cycloalkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkoxy, amino, C₁₋₆ alkylamino, di(C₁₋₆ alkyl)amino, thio, C₁₋₆ alkylthio, C₁₋₆ alkylsulfinyl, C₁₋₆ alkylsulfonyl, carbamyl, C₁₋₆ alkylcarbamyl, di(C₁₋₆ alkyl)carbamyl, carboxy, C₁₋₆ alkylcarbonyl, C₁₋₄ alkoxycarbonyl, C₁₋₆ alkylcarbonylamino, C₁₋₆ alkoxycarbonylamino, C₁₋₆ alkylcarbonyloxy, aminocarbonyloxy, C₁₋₆ alkylaminocarbonyloxy, di(C₁₋₆ alkyl)aminocarbonyloxy, C₁₋₆ alkylsulfonylamino, aminosulfonyl, C₁₋₆ alkylaminosulfonyl, di(C₁₋₆ alkyl)aminosulfonyl, aminosulfonylamino, C₁₋₆ alkylaminosulfonylamino, di(C₁₋₆ alkyl)aminosulfonylamino, aminocarbonylamino, C₁₋₆ alkylaminocarbonylamino, and di(C₁₋₆ alkyl)aminocarbonylamino.

In some embodiments:

R¹ is H;

R² is selected from H, D, halo, C₁₋₆ alkyl, CN, hydroxymethyl, and C₁₋₆ haloalkyl;

Cy¹ is selected from phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl, each of which is optionally substituted with 1, 2, 3, or 4 independently selected R⁷ substituents;

each R⁷ is independently selected from OH, CN, halo, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, cyano-C₁₋₆ alkyl, HO—C₁₋₆ alkyl, C₁₋₆ alkoxy-C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkoxy, amino, C₁₋₆ alkylamino, and di(C₁₋₆ alkyl)amino;

R⁴ is selected from —C(O)NR⁵R⁶ and -L-Cy⁴;

R⁵ is selected from H, C₁₋₆ alkyl, and C₁₋₆ haloalkyl;

R⁶ is selected from H, C₁₋₆ alkyl, and C₁₋₆ haloalkyl;

L is selected from Y¹, C₁₋₃ alkylene, C₁₋₃ alkylene-Y¹, and Y¹—C₁₋₃ alkylene, wherein said alkylene linking groups are each optionally substituted with 1, 2, or 3 independently selected R^(8D) substituents and optionally substituted with 1 R⁸ substituent;

each Y¹ is independently selected from —O—, —S—, —C(O)—, —C(O)NR^(Y)—, —C(O)O—, —OC(O)—, —OC(O)NR^(Y)—, —NR^(Y)—, —NR^(Y)C(O)—, —NR^(Y)C(O)O—, —NR^(Y)C(O)NR^(Y)—, —NR^(Y)S(O)₂—, —S(O)₂—, —S(O)₂NR^(Y)—, and —NR^(Y)S(O)₂NR^(Y)—;

R^(Y) is selected from H and C₁₋₆ alkyl;

Cy⁴ is selected from C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, and 4-10 membered heterocycloalkyl, wherein the C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, and 4-10 membered heterocycloalkyl is optionally substituted with 1, 2, 3, 4, or 5 substituents independently selected from R^(8D) and R⁸;

each R⁸ is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl, CN, NO₂, OR^(a8), NHOR^(a8), C(O)R^(b8), C(O)NR^(c8)R^(d8), C(O)NR^(c8)(OR^(a8)), C(O)OR^(a8), NR^(c8)R^(d8), NR^(c8)C(O)R^(b8), NR^(c8)C(O)OR^(a8), NR^(c8)C(O)NR^(c8)R^(d8), NR^(c8)S(O)₂R^(b8), NR^(c8)S(O)₂NR^(c8)R^(d8), S(O)₂R^(b8), and S(O)₂NR^(c8)R^(d8), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl of R⁸ are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8A) substituents.

each R^(a8), R^(b8), R^(c8), and R^(d8) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8A) substituents;

each R^(8A) is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, CN, OR^(a81), SR^(a81), C(O)R^(b81)C(O)NR^(c81)R^(d81), C(O)OR^(a81), OC(O)R^(b81), OC(O)NR^(c81)R^(d81), NR^(c81)R^(d81), NR^(c81)C(O)R^(b81), NR^(c81)C(O)OR^(a81), NR^(c81)C(O)NR^(c81)R^(d81), NR^(c81)S(O)NR^(c81)R^(d81), NR^(c81)S(O)R^(b81), NR^(c81)S(O)₂R^(b81), wherein the C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl of R^(8A) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8B) substituents;

each R^(a81), R^(b81), R^(c81) and R^(d81) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl and 4-10 membered heterocycloalkyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl of R^(a81), R^(b81), R^(c81) and R^(d81) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8B) substituents;

or, any R^(c81) and R^(d81), attached to the same N atom, together with the N atom to which they are attached, form a 4-10 membered heterocycloalkyl group, wherein the 4-10 membered heterocycloalkyl group is optionally substituted with 1, 2, 3, or 4 independently selected R^(8B) substituents;

each R^(8B) is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, CN, OR^(a82), SR^(a82), C(O)R^(b82), C(O)NR^(c82)R^(d82), C(O)OR^(a82), OC(O)R^(b82), OC(O)NR^(c82)R^(d82), NR^(c82)R^(d82), NR^(c82)NR^(c82)R^(d82), NR^(c82)C(O)R^(b82), NR^(c82)C(O)OR^(a82), NR^(c82)C(O)NR^(c82)R^(d82), NR^(C82)S(O)₂R^(b82), NR^(C82)S(O)₂NR^(c82)R^(d82), S(O)₂R^(b82), and S(O)₂NR^(c82)R^(d82), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl of R^(8B) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8C) substituents;

each R^(a82), R^(b82), R^(c82), and R^(d82) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl of R^(a82), R^(b82), R^(c82) and R^(d82) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8C) substituents; and

each R^(8C) is independently selected from OH, CN, halo, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, cyano-C₁₋₆ alkyl, HO—C₁₋₆ alkyl, C₁₋₆ alkoxy-C₁₋₆ alkyl, C₃₋₅ cycloalkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkoxy, amino, C₁₋₆ alkylamino, di(C₁₋₆ alkyl)amino, thio, C₁₋₆ alkylthio, C₁₋₆ alkylsulfinyl, C₁₋₆ alkylsulfonyl, carbamyl, C₁₋₆ alkylcarbamyl, di(C₁₋₆ alkyl)carbamyl, carboxy, C₁₋₆ alkylcarbonyl, C₁₋₄ alkoxycarbonyl, C₁₋₆ alkylcarbonylamino, C₁₋₆ alkoxycarbonylamino, C₁₋₆ alkylcarbonyloxy, aminocarbonyloxy, C₁₋₆ alkylaminocarbonyloxy, di(C₁₋₆ alkyl)aminocarbonyloxy, C₁₋₆ alkylsulfonylamino, aminosulfonyl, C₁₋₆ alkylaminosulfonyl, di(C₁₋₆ alkyl)aminosulfonyl, aminosulfonylamino, C₁₋₆ alkylaminosulfonylamino, di(C₁₋₆ alkyl)aminosulfonylamino, aminocarbonylamino, C₁₋₆ alkylaminocarbonylamino, and di(C₁₋₆ alkyl)aminocarbonylamino.

In some embodiments:

R¹ is H;

R² is selected from H, D, halo, C₁₋₆ alkyl, and C₁₋₆ haloalkyl;

Cy¹ is selected from phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, each of which is optionally substituted with 1, 2, 3, or 4 independently selected R⁷ substituents;

each R⁷ is independently selected from OH, CN, halo, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, cyano-C₁₋₆ alkyl, HO—C₁₋₆ alkyl, C₁₋₆ alkoxy-C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkoxy, amino, C₁₋₆ alkylamino, and di(C₁₋₆ alkyl)amino.

R⁴ is selected from —C(O)NR⁵R⁶ and -L-Cy⁴;

R⁵ is selected from H, C₁₋₆ alkyl, and C₁₋₆ haloalkyl;

R⁶ is selected from H, C₁₋₆ alkyl, and C₁₋₆ haloalkyl;

L is selected from Y¹, C₁₋₃ alkylene, C₁₋₃ alkylene-Y¹, and Y¹—C₁₋₃ alkylene, wherein said alkylene linking groups are each optionally substituted with 1, 2, or 3 independently selected R^(8D) substituents and optionally substituted with 1 R⁸ substituent;

each Y¹ is independently selected from —O—, —S—, —C(O)—, —C(O)NR^(Y)—, —C(O)O—, —OC(O)—, —OC(O)NR^(Y)—, —NR^(Y)—, —NR^(Y)C(O)—, —NR^(Y)C(O)O—, —NR^(Y)C(O)NR^(Y)—, —NR^(Y)S(O)₂—, —S(O)₂—, —S(O)₂NR^(Y)—, and —NR^(Y)S(O)₂NR^(Y)—;

R^(Y) is selected from H and C₁₋₆ alkyl;

Cy⁴ is selected from C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, and 4-10 membered heterocycloalkyl, wherein the C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, and 4-10 membered heterocycloalkyl is optionally substituted with 1, 2, 3, 4, or 5 substituents independently selected from R^(8D) and R⁸;

each R⁸ is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl, CN, NO₂, OR^(a8), NHOR^(a8), C(O)R^(b8), C(O)NR^(c8)R^(d8), C(O)NR^(c8)(OR^(a8)), C(O)OR^(a8), NR^(c8)R^(d8), NR^(c8)C(O)R^(b8), NR^(c8)C(O)OR^(a8), NR^(c8)C(O)NR^(c8)R^(d8), NR^(c8)S(O)₂R^(b8), NR^(c8)S(O)₂NR^(c8)R^(d8), S(O)₂R^(b8), and S(O)₂NR^(c8)R^(d8), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl of R⁸ are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8A) substituents.

each R^(a8), R^(b8), R^(c8), and R^(d8) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8A) substituents;

each R^(8A) is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, CN, OR^(a81), SR^(a81), C(O)R^(b81), C(O)NR^(c81)R^(d81), C(O)OR^(a81), OC(O)R^(b81), OC(O)NR^(c81)R^(d81) NR^(c81)R^(d81), NR^(c81)C(O)R^(b81), NR^(c81)C(O)OR^(a81), NR^(c81)C(O)NR^(c81)R^(d81), NR^(c81)S(O)NR^(c81)R^(d81) NR^(c81)S(O)R^(b81), NR^(c81)S(O)₂R^(b81), wherein the C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl of R^(8A) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8B) substituents;

each R^(a81), R^(b81), R^(c81) and R^(d81) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl of R^(a81), R^(b81)R^(c81) and R^(d81) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8B) substituents;

each R^(8B) is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, CN, OR^(a82), SR^(a82), C(O)R^(b82), C(O)NR^(c82)R^(d82), C(O)OR^(a82), OC(O)R^(b82), OC(O)NR^(c82)R^(d82), NR^(c82)R^(d82), NR^(c82)NR^(c82)R^(d82), NR^(c82)C(O)R^(b82), NR^(c82)C(O)OR^(a82), NR^(c82)C(O)NR^(c82)R^(d82), NR^(C82)S(O)₂R^(b82), NR^(c82)S(O)₂NR^(c82)R^(d82), S(O)₂R^(b82), and S(O)₂NR^(c82)R^(d82), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl of R^(8B) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(ac) substituents;

each R^(a82), R^(b82), R^(c82), and R^(d82) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl of R^(a82), R^(b82), R^(c82) and R^(d82) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(ac) substituents; and

each R^(8C) is independently selected from OH, CN, halo, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, cyano-C₁₋₆ alkyl, HO—C₁₋₆ alkyl, C₁₋₆ alkoxy-C₁₋₆ alkyl, C₃₋₅ cycloalkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkoxy, amino, C₁₋₆ alkylamino, di(C₁₋₆ alkyl)amino, thio, C₁₋₆ alkylthio, C₁₋₆ alkylsulfinyl, C₁₋₆ alkylsulfonyl, carbamyl, C₁₋₆ alkylcarbamyl, di(C₁₋₆ alkyl)carbamyl, carboxy, C₁₋₆ alkylcarbonyl, C₁₋₄ alkoxycarbonyl, C₁₋₆ alkylcarbonylamino, C₁₋₆ alkoxycarbonylamino, C₁₋₆ alkylcarbonyloxy, aminocarbonyloxy, C₁₋₆ alkylaminocarbonyloxy, di(C₁₋₆alkyl)aminocarbonyloxy, C₁₋₆ alkylsulfonylamino, aminosulfonyl, C₁₋₆ alkylaminosulfonyl, di(C₁₋₆ alkyl)aminosulfonyl, aminosulfonylamino, C₁₋₆ alkylaminosulfonylamino, di(C₁₋₆ alkyl)aminosulfonylamino, aminocarbonylamino, C₁₋₆ alkylaminocarbonylamino, and di(C₁₋₆ alkyl)aminocarbonylamino.

In some embodiments,

R¹ is H;

R² is selected from H, CN, and hydroxymethyl;

Cy¹ is 3-cyanophenyl, wherein the 3-cyanophenyl is optionally substituted by one of F or CH₃;

R⁴ is selected from —C(O)NR⁵R⁶ and -L-Cy⁴;

R⁵ is H;

R⁶ is C₁₋₃ alkyl;

L is selected from Y¹, C₁₋₃ alkylene, C₁₋₃ alkylene-Y¹, and Y¹—C₁₋₃ alkylene, wherein said alkylene linking groups are each optionally substituted with 1, 2, or 3 independently selected R^(8D) substituents and optionally substituted with 1 R⁸ substituent;

each Y¹ is —NR^(Y)—;

R^(Y) is selected from H and C₁₋₃ alkyl;

Cy⁴ is selected from phenyl, cyclohexyl, pyridyl, pyrrolidinonyl, and imidazolyl, wherein the phenyl, cyclohexyl, pyridyl, pyrrolidinonyl, and imidazolyl are each optionally substituted with 1, 2, 3, 4, or 5 substituents independently selected from R^(8D) and R⁸;

each R⁸ is independently selected from halo, C₁₋₃ alkyl, C₁₋₃ haloalkyl, C₂₋₄ alkenyl, C₂₋₄ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl, CN, NO₂, OR^(a8), NHOR^(a8), C(O)R^(b8), C(O)NR^(c8)R^(d8), C(O)NR^(c8)(OR^(a8)), C(O)OR^(a8), NR^(c8)R^(d8), NR^(c8)C(O)R^(b8), NR^(c8)C(O)OR^(a8), NR^(c8)C(O)NR^(c8)R^(d8), NR^(c8)S(O)₂R^(b8), NR^(c8)S(O)₂NR^(c8)R^(d8), S(O)₂R^(b8), and S(O)₂NR^(c8)R^(d8), wherein the C₁₋₃ alkyl, C₂₋₄ alkenyl, C₂₋₄ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl of R⁸ are each optionally substituted with 1, 2, or 3 independently selected R^(8A) substituents.

each R^(a8), R^(b8), R^(c8), and R^(d8) is independently selected from H and C₁₋₃ alkyl, wherein the C₁₋₃ alkyl is optionally substituted with 1 or 2 independently selected R^(8A) substituents;

each R^(8A) is independently selected from halo, C₁₋₃ alkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, CN, OR^(a81), SR^(a81), C(O)R^(b81), C(O)NR^(c81)R^(d81), C(O)OR^(a81), OC(O)R^(b81), OC(O)NR^(c81)R^(d81), NR^(c81)R^(d81), NR^(c81)C(O)R^(b81), NR^(c81)C(O)OR^(a81), and NR^(c81)C(O)NR^(c81)R^(d81), wherein the C₁₋₃ alkyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl of R^(8A) are each optionally substituted with 1, 2, or 3 independently selected R^(8B) substituents;

each R^(a81), R^(b81), R^(c81) and R^(d8) is independently selected from H, C₁₋₃ alkyl, and 4-7 membered heterocycloalkyl, wherein the C₁₋₃ alkyl and 4-7 membered heterocycloalkyl of R^(a81), R^(b81), R^(c81) and R^(d81) are each optionally substituted with 1, 2, or 3 independently selected R^(8B) substituents;

or, any R^(c81) and R^(d81), attached to the same N atom, together with the N atom to which they are attached, form a 4-10 membered heterocycloalkyl group, wherein the 4-10 membered heterocycloalkyl group is optionally substituted with 1 or 2 independently selected R^(8B) substituents;

each R^(8B) is independently selected from halo, C₁₋₃ alkyl, and 4-7 membered heterocycloalkyl, wherein the C₁₋₃ alkyl is optionally substituted with 1 or 2 independently selected R^(8C) substituents; and

each R^(8C) is independently selected from OH, CN, halo, C₁₋₃ alkyl, C₁₋₃ haloalkyl, C₁₋₃ alkoxy, and carboxy.

In some embodiments:

R¹ is H;

R² is selected from H, CN, and C₁₋₆ alkyl, wherein the C₁₋₆ alkyl is optionally substituted with 1 or 2 OH groups;

Cy¹ is phenyl which is optionally substituted with 1 or 2 independently selected R⁷ substituents;

each R⁷ is independently selected from D, halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, CN, NO₂, OH, amino, C₁₋₃ alkylamino, and di(C₁₋₃ alkyl)amino;

R⁴ is selected from —C(O)NR⁵R⁶ and -L-Cy⁴;

R⁵ is selected from H, C₁₋₆ alkyl, and C₁₋₆ haloalkyl;

R⁶ is selected from H, C₁₋₆ alkyl, and C₁₋₆ haloalkyl;

L is selected from —C(O)NR^(Y)—, —OC(O)NR^(Y)—, —NR^(Y)—, —NR^(Y)C(O)—, —NR^(Y)C(O)O—, —NR^(Y)C(O)NR^(Y)—, —NR^(Y)S(O)₂—, —NR^(Y)S(O)₂NR^(Y)—, C₁₋₃ alkylene, C₁₋₃ alkylene-Y¹, and Y¹—C₁₋₃ alkylene, wherein said alkylene linking groups are each optionally substituted with 1, 2, or 3 independently selected R⁸ substituents;

each Y¹ is —NR^(Y)—;

R^(Y) is selected from H, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, and C₁₋₆ haloalkyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl, of R^(Y) are each optionally substituted with 1, 2, 3, or 4 independently selected R⁸ substituents;

Cy⁴ is selected from C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, and 4-10 membered heterocycloalkyl, wherein the C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, and 4-10 membered heterocycloalkyl is optionally substituted with 1, 2, 3, 4, or 5 independently selected R⁸ substituents;

each R⁸ is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₆ cycloalkyl, 5-6 membered heteroaryl, 4-6 membered heterocycloalkyl, OH, CN, and NO₂, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₆ cycloalkyl, 5-6 membered heteroaryl, and 4-6 membered heterocycloalkyl of R⁸ are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8A) substituents; and

each R^(8A) is independently selected from OH, NO₂, CN, halo, C₁₋₃ alkyl, C₂₋₃ alkenyl, C₂₋₃ alkynyl, C₁₋₃ haloalkyl, C₁₋₃ alkoxy, C₁₋₃ haloalkoxy, amino, C₁₋₃ alkylamino, and di(C₁₋₃ alkyl)amino.

In some embodiments:

R¹ is H;

R² is selected from H and C₁₋₆ alkyl, wherein the C₁₋₆ alkyl is optionally substituted with 1 or 2 OH groups;

Cy¹ is selected phenyl which is optionally substituted with 1 or 2 independently selected R⁷ substituents;

each R⁷ is independently selected from D, halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, CN, NO₂, OH, amino, C₁₋₃ alkylamino, and di(C₁₋₃ alkyl)amino;

R⁴ is selected from —C(O)NR⁵R⁶ and -L-Cy⁴;

R⁵ is selected from H, C₁₋₆ alkyl, and C₁₋₆ haloalkyl;

R⁶ is selected from H, C₁₋₆ alkyl, and C₁₋₆ haloalkyl;

L is selected from —C(O)NR^(Y)—, —OC(O)NR^(Y)—, —NR^(Y)—, —NR^(Y)C(O)—, —NR^(Y)C(O)O—, —NR^(Y)C(O)NR^(Y)—, —NR^(Y)S(O)₂—, —NR^(Y)S(O)₂NR^(Y)—, C₁₋₃ alkylene, C₁₋₃ alkylene-Y¹, and Y¹—C₁₋₃ alkylene, wherein said alkylene linking groups are each optionally substituted with 1, 2, or 3 independently selected R⁸ substituents;

R^(Y) is selected from H, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, and C₁₋₆ haloalkyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl, of R^(Y) are each optionally substituted with 1, 2, 3, or 4 independently selected R⁸ substituents;

Cy⁴ is selected from C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, and 4-10 membered heterocycloalkyl, wherein the C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, and 4-10 membered heterocycloalkyl is optionally substituted with 1, 2, 3, 4, or 5 independently selected R⁸ substituents;

each R⁸ is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₆ cycloalkyl, 5-6 membered heteroaryl, 4-6 membered heterocycloalkyl, OH, CN, and NO₂, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₆ cycloalkyl, 5-6 membered heteroaryl, and 4-6 membered heterocycloalkyl of R⁸ are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8A) substituents; and

each R^(8A) is independently selected from OH, NO₂, CN, halo, C₁₋₃ alkyl, C₂₋₃ alkenyl, C₂₋₃ alkynyl, C₁₋₃ haloalkyl, C₁₋₃ alkoxy, C₁₋₃ haloalkoxy, amino, C₁₋₃ alkylamino, and di(C₁₋₃ alkyl)amino.

In some embodiments:

R¹ is H;

R² is selected from H, CN, and hydroxymethyl;

Cy¹ is selected from 3-cyanophenyl, 2-methylbenzonitrile, and 2-fluorobenzonitrile;

R⁴ is selected from —C(O)NR⁵R⁶ and -L-Cy⁴;

R⁵ is selected from H and C₁₋₃ alkyl;

R⁶ is selected from H and C₁₋₃ alkyl;

L is selected from C₁₋₃ alkylene, C₁₋₃ hydroxyalkylene, and C₁₋₃ aminoalkylene;

Cy⁴ is selected from phenyl, C₃₋₆ cycloalkyl, 5-6 membered heteroaryl, and 4-6 membered heterocycloalkyl, wherein the phenyl, C₃₋₆ cycloalkyl, 5-6 membered heteroaryl, and 4-6 membered heterocycloalkyl is optionally substituted with 1, 2, 3, 4, or 5 independently selected R⁸ substituents;

each R⁸ is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₆ cycloalkyl, 5-6 membered heteroaryl, 4-6 membered heterocycloalkyl, OH, CN, and NO₂, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₆ cycloalkyl, 5-6 membered heteroaryl, and 4-6 membered heterocycloalkyl of R⁸ are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8A) substituents; and

each R^(8A) is independently selected from OH, NO₂, CN, halo, C₁₋₃ alkyl, C₂₋₃ alkenyl, C₂₋₃ alkynyl, C₁₋₃ haloalkyl, C₁₋₃ alkoxy, C₁₋₃ haloalkoxy, amino, C₁₋₃ alkylamino, and di(C₁₋₃ alkyl)amino.

In some embodiments:

R¹ is H;

R² is selected from H and hydroxymethyl;

Cy¹ is 3-cyanophenyl;

R⁴ is selected from —C(O)NR⁵R⁶ and -L-Cy⁴;

R⁵ is selected from H and C₁₋₃ alkyl;

R⁶ is selected from H and C₁₋₃ alkyl;

L is selected from C₁₋₃ alkylene, C₁₋₃ hydroxyalkylene, and C₁₋₃ aminoalkylene;

Cy⁴ is selected from phenyl, C₃₋₆ cycloalkyl, 5-6 membered heteroaryl, and 4-6 membered heterocycloalkyl, wherein the phenyl, C₃₋₆ cycloalkyl, 5-6 membered heteroaryl, and 4-6 membered heterocycloalkyl is optionally substituted with 1, 2, 3, 4, or 5 independently selected R⁸ substituents;

each R⁸ is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₆ cycloalkyl, 5-6 membered heteroaryl, 4-6 membered heterocycloalkyl, OH, CN, and NO₂, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₆ cycloalkyl, 5-6 membered heteroaryl, and 4-6 membered heterocycloalkyl of R⁸ are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8A) substituents; and

each R^(8A) is independently selected from OH, NO₂, CN, halo, C₁₋₃ alkyl, C₂₋₃ alkenyl, C₂₋₃ alkynyl, C₁₋₃ haloalkyl, C₁₋₃ alkoxy, C₁₋₃ haloalkoxy, amino, C₁₋₃ alkylamino, and di(C₁₋₃ alkyl)amino.

In some embodiments the compound of Formula (I) is a compound of Formula (II):

or a pharmaceutically acceptable salt thereof.

In some embodiments the compound of Formula (I) is a compound of Formula (III):

or a pharmaceutically acceptable salt thereof.

In some embodiments the compound of Formula (I) is a compound of Formula (IV):

or a pharmaceutically acceptable salt thereof.

In some embodiments the compound of Formula (I) is a compound of Formula (V):

or a pharmaceutically acceptable salt thereof.

In some embodiments the compound of Formula (I) is a compound of Formula (VI):

or a pharmaceutically acceptable salt thereof.

In some embodiments the compound of Formula (I) is a compound of Formula (VII):

or a pharmaceutically acceptable salt thereof.

In some embodiments the compound of Formula (I) is a compound of Formula (VIII):

or a pharmaceutically acceptable salt thereof.

In some embodiments the compound of Formula (I) is a compound of Formula (IX):

or a pharmaceutically acceptable salt thereof.

In an aspect, provided herein is a compound selected from:

-   3-(5-Amino-2-(hydroxy(phenyl)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile; -   3-(5-Amino-2-benzyl-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile; -   3-(5-Amino-2-(pyridin-2-ylmethyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile; -   3-(5-Amino-2-(cyclohexylmethyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile; -   3-(5-Amino-2-(3-(1-methyl-1H-pyrazol-4-yl)benzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile; -   3-(5-Amino-2-((2-oxopyrrolidin-1-yl)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile; -   3-(5-Amino-2-((1-methyl-1H-imidazol-2-yl)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile; -   3-(5-Amino-2-(amino(phenyl)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile; -   3-(5-Amino-2-benzyl-8-(hydroxymethyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile; -   3-(5-Amino-2-(phenylamino)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile; -   3-(5-Amino-2-benzylimidazo[1,2-c]pyrimidin-7-yl)benzonitrile; and -   5-Amino-7-(3-cyanophenyl)-N-ethyl-[1,2,4]triazolo[1,5-c]pyrimidine-2-carboxamide; -   3-(5-Amino-2-((2,6-difluorophenyl)     (hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-methylbenzonitrile; -   3-(5-Amino-2-((2,6-difluorophenyl)     (hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile; -   5-Amino-7-(3-cyano-2-fluorophenyl)-2-((2,6-difluorophenyl)(hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidine-8-carbonitrile; -   3-(5-Amino-2-((2-fluoro-6-(((1-methyl-2-oxopyrrolidin-3-yl)amino)methyl)phenyl)     (hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile; -   3-(5-Amino-2-((2-fluoro-6-((6-methyl-5-oxo-2,6-diazaspiro[3,4]octan-2-yl)methyl)phenyl)     (hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile; -   3-(5-Amino-2-((2-((ethyl(2-oxopyrrolidin-3-yl)amino)methyl)-6-fluorophenyl)(hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile; -   2-(3-((2-((5-Amino-7-(3-cyano-2-fluorophenyl)-[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)methyl)-3-fluorobenzyl)amino)-2-oxopyrrolidin-1-yl)acetic     acid; -   3-(5-Amino-2-(2-fluoro-6-(((2-oxotetrahydrofuran-3-yl)amino)methyl)benzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile; -   3-(5-Amino-2-(2-fluoro-6-(((2-oxopyrrolidin-3-yl)amino)methyl)benzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile; -   3-(2-(2-((3-(2H-Tetrazol-5-yl)pyrrolidin-1-yl)methyl)-6-fluorobenzyl)-5-amino-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile; -   3-(5-Amino-2-(2-(((1-ethyl-2-oxopyrrolidin-3-yl)amino)methyl)-6-fluorobenzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile; -   N-(1-(2-((5-Amino-7-(3-cyano-2-fluorophenyl)-[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)methyl)-3-fluorobenzyl)pyrrolidin-3-yl)acetamide; -   3-(2-(2-((2-(2H-Tetrazol-5-yl)pyrrolidin-1-yl)methyl)-6-fluorobenzyl)-5-amino-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile; -   1-(2-((5-Amino-7-(3-cyano-2-fluorophenyl)-[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)methyl)-3-fluorobenzyl)pyrrolidine-3-carbonitrile; -   3-(5-Amino-2-(2-fluoro-6-((6-methyl-5-oxo-2,6-diazaspiro[3.4]octan-2-yl)methyl)benzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile; -   3-(5-Amino-2-(2-fluoro-6-(((1-methyl-2-oxopyrrolidin-3-yl)amino)methyl)benzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile; -   2-(3-((2-((5-Amino-7-(3-cyano-2-fluorophenyl)-[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)methyl)-3-fluorobenzyl)(ethyl)amino)-2-oxopyrrolidin-1-yl)acetic     acid; -   3-(5-Amino-2-(2-((ethyl(1-methyl-2-oxopyrrolidin-3-yl)amino)methyl)-6-fluorobenzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile; -   3-(5-Amino-2-(2-((ethyl(2-oxopyrrolidin-3-yl)amino)methyl)-6-fluorobenzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile; -   3-(5-Amino-2-(((6-(1-(piperidin-4-yl)-1H-pyrazol-4-yl)pyridin-2-yl)methyl)amino)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile;     and -   3-(5-Amino-2-(((6-(1-(2-morpholinoethyl)-1H-pyrazol-4-yl)pyridin-2-yl)methyl)amino)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile,

or a pharmaceutically acceptable salt of any of the aforementioned.

It is further appreciated that certain features of the invention, which are, for clarity, described in the context of separate embodiments, can also be provided in combination in a single embodiment. Conversely, various features of the invention which are, for brevity, described in the context of a single embodiment, can also be provided separately or in any suitable subcombination.

The term “n-membered” where n is an integer typically describes the number of ring-forming atoms in a moiety where the number of ring-forming atoms is n. For example, piperidinyl is an example of a 6-membered heterocycloalkyl ring, pyrazolyl is an example of a 5-membered heteroaryl ring, pyridyl is an example of a 6-membered heteroaryl ring, and 1,2,3,4-tetrahydro-naphthalene is an example of a 10-membered cycloalkyl group.

As used herein, the phrase “optionally substituted” means unsubstituted or substituted. The substituents are independently selected, and substitution may be at any chemically accessible position.

As used herein, the term “substituted” means that a hydrogen atom is removed and replaced by a substituent. A single divalent substituent, e.g., oxo, can replace two hydrogen atoms. It is to be understood that substitution at a given atom is limited by valency.

As used herein, the phrase “each ‘variable’ is independently selected from” means substantially the same as wherein “at each occurrence ‘variable’ is selected from.” When any variable occurs more than one time in any constituent or formula for a compound, its definition at each occurrence is independent of its definition at every other occurrence. Thus, for example, if a group is shown to be substituted with 1, 2, 3, or 4 “R” variables, then said group may optionally be substituted with up to four R groups and R at each occurrence is selected independently from the definition of R. Also, combinations of substituents and/or variables are permissible only if such combinations result in stable compounds.

Throughout the definitions, the term “C_(n-m)” indicates a range which includes the endpoints, wherein n and m are integers and indicate the number of carbons. Examples include C₁₋₃, C₁₋₄, C₁₋₆, and the like.

As used herein, the term “C_(n-m) alkyl”, employed alone or in combination with other terms, refers to a saturated hydrocarbon group that may be straight-chain or branched, having n to m carbons. Examples of alkyl moieties include, but are not limited to, chemical groups such as methyl (Me), ethyl (Et), n-propyl (n-Pr), isopropyl (iPr), n-butyl, tert-butyl, isobutyl, sec-butyl; higher homologs such as 2-methyl-1-butyl, n-pentyl, 3-pentyl, n-hexyl, 1,2,2-trimethylpropyl, and the like. In some embodiments, the alkyl group contains from 1 to 6 carbon atoms, from 1 to 4 carbon atoms, from 1 to 3 carbon atoms, or 1 to 2 carbon atoms.

As used herein, “C_(n-m) alkenyl” refers to an alkyl group having one or more double carbon-carbon bonds and having n to m carbons. Example alkenyl groups include, but are not limited to, ethenyl, n-propenyl, isopropenyl, n-butenyl, sec-butenyl, and the like. In some embodiments, the alkenyl moiety contains 2 to 6, 2 to 4, or 2 to 3 carbon atoms.

As used herein, “C_(n-m) alkynyl” refers to an alkyl group having one or more triple carbon-carbon bonds and having n to m carbons. Example alkynyl groups include, but are not limited to, ethynyl, propyn-1-yl, propyn-2-yl, and the like. In some embodiments, the alkynyl moiety contains 2 to 6, 2 to 4, or 2 to 3 carbon atoms.

As used herein, the term “C_(n-m) alkoxy”, employed alone or in combination with other terms, refers to a group of formula-O-alkyl, wherein the alkyl group has n to m carbons. Example alkoxy groups include, but are not limited to, methoxy, ethoxy, propoxy (e.g., n-propoxy and isopropoxy), butoxy (e.g., n-butoxy and tert-butoxy), and the like. In some embodiments, the alkyl group has 1 to 6, 1 to 4, or 1 to 3 carbon atoms.

As used herein, the term “amino” refers to a group of formula —NH₂.

As used herein, the term “aryl,” employed alone or in combination with other terms, refers to an aromatic hydrocarbon group, which may be monocyclic or polycyclic (e.g., having 2, 3, or 4 fused rings). The term “C_(n-m) aryl” refers to an aryl group having from n to m ring carbon atoms. Aryl groups include, e.g., phenyl, naphthyl, anthracenyl, phenanthrenyl, indanyl, indenyl, and the like. In some embodiments, the aryl group has from 5 to 10 carbon atoms. In some embodiments, the aryl group is phenyl or naphthyl. In some embodiments, the aryl is phenyl.

As used herein, “halo” refers to F, Cl, Br, or I. In some embodiments, halo is F, Cl, or Br. In some embodiments, halo is F or Cl. In some embodiments, halo is F. In some embodiments, halo is Cl.

As used herein, “C_(n-m) haloalkoxy” refers to a group of formula —O-haloalkyl having n to m carbon atoms. Example haloalkoxy groups include OCF₃ and OCHF₂. In some embodiments, the haloalkoxy group is fluorinated only. In some embodiments, the alkyl group has 1 to 6, 1 to 4, or 1 to 3 carbon atoms.

As used herein, the term “C_(n-m) haloalkyl”, employed alone or in combination with other terms, refers to an alkyl group having from one halogen atom to 2s+1 halogen atoms which may be the same or different, where “s” is the number of carbon atoms in the alkyl group, wherein the alkyl group has n to m carbon atoms. In some embodiments, the haloalkyl group is fluorinated only. In some embodiments, the alkyl group has 1 to 6, 1 to 4, or 1 to 3 carbon atoms. Example haloalkyl groups include CF₃, C₂F₅, CHF₂, CH₂F, CCl₃, CHCl₂, C₂Cl₅ and the like.

As used herein, the term “thio” refers to a group of formula —SH.

As used herein, the term “carbamyl” to a group of formula —C(O)NH₂.

As used herein, the term “carbonyl”, employed alone or in combination with other terms, refers to a —C(O)— group.

As used herein, the term “C_(n-m) alkylamino” refers to a group of formula —NH(alkyl), wherein the alkyl group has n to m carbon atoms. In some embodiments, the alkyl group has 1 to 6, 1 to 4, or 1 to 3 carbon atoms.

As used herein, the term “C_(n-m) alkoxycarbonyl” refers to a group of formula —C(O)O— alkyl, wherein the alkyl group has n to m carbon atoms. In some embodiments, the alkyl group has 1 to 6, 1 to 4, or 1 to 3 carbon atoms.

As used herein, the term “C_(n-m) alkylcarbonyl” refers to a group of formula —C(O)-alkyl, wherein the alkyl group has n to m carbon atoms. In some embodiments, the alkyl group has 1 to 6, 1 to 4, or 1 to 3 carbon atoms.

As used herein, the term “C_(n-m) alkylcarbonylamino” refers to a group of formula —NHC(O)-alkyl, wherein the alkyl group has n to m carbon atoms. In some embodiments, the alkyl group has 1 to 6, 1 to 4, or 1 to 3 carbon atoms.

As used herein, the term “C_(n-m) alkylsulfonylamino” refers to a group of formula —NHS(O)₂-alkyl, wherein the alkyl group has n to m carbon atoms. In some embodiments, the alkyl group has 1 to 6, 1 to 4, or 1 to 3 carbon atoms.

As used herein, the term “aminosulfonyl” refers to a group of formula —S(O)₂NH₂.

As used herein, the term “C_(n-m) alkylaminosulfonyl” refers to a group of formula —S(O)₂NH(alkyl), wherein the alkyl group has n to m carbon atoms. In some embodiments, the alkyl group has 1 to 6, 1 to 4, or 1 to 3 carbon atoms.

As used herein, the term “di(C_(n-m) alkyl)aminosulfonyl” refers to a group of formula —S(O)₂N(alkyl)₂, wherein each alkyl group independently has n to m carbon atoms. In some embodiments, each alkyl group has, independently, 1 to 6, 1 to 4, or 1 to 3 carbon atoms.

As used herein, the term “aminosulfonylamino” refers to a group of formula —NHS(O)₂NH₂.

As used herein, the term “C_(n-m) alkylaminosulfonylamino” refers to a group of formula —NHS(O)₂NH(alkyl), wherein the alkyl group has n to m carbon atoms. In some embodiments, the alkyl group has 1 to 6, 1 to 4, or 1 to 3 carbon atoms.

As used herein, the term “di(C_(n-m) alkyl)aminosulfonylamino” refers to a group of formula —NHS(O)₂N(alkyl)₂, wherein each alkyl group independently has n to m carbon atoms. In some embodiments, each alkyl group has, independently, 1 to 6, 1 to 4, or 1 to 3 carbon atoms.

As used herein, the term “aminocarbonylamino”, employed alone or in combination with other terms, refers to a group of formula —NHC(O)NH₂.

As used herein, the term “C_(n-m) alkylaminocarbonylamino” refers to a group of formula —NHC(O)NH(alkyl), wherein the alkyl group has n to m carbon atoms. In some embodiments, the alkyl group has 1 to 6, 1 to 4, or 1 to 3 carbon atoms.

As used herein, the term “di(C_(n-m) alkyl)aminocarbonylamino” refers to a group of formula —NHC(O)N(alkyl)₂, wherein each alkyl group independently has n to m carbon atoms. In some embodiments, each alkyl group has, independently, 1 to 6, 1 to 4, or 1 to 3 carbon atoms.

As used herein, the term “C_(n-m) alkylcarbamyl” refers to a group of formula —C(O)—NH(alkyl), wherein the alkyl group has n to m carbon atoms. In some embodiments, the alkyl group has 1 to 6, 1 to 4, or 1 to 3 carbon atoms.

As used herein, the term “C_(n-m) alkylthio” refers to a group of formula —S-alkyl, wherein the alkyl group has n to m carbon atoms. In some embodiments, the alkyl group has 1 to 6, 1 to 4, or 1 to 3 carbon atoms.

As used herein, the term “C_(n-m) alkylsulfinyl” refers to a group of formula —S(O)-alkyl, wherein the alkyl group has n to m carbon atoms. In some embodiments, the alkyl group has 1 to 6, 1 to 4, or 1 to 3 carbon atoms.

As used herein, the term “C_(n-m) alkylsulfonyl” refers to a group of formula —S(O)₂-alkyl, wherein the alkyl group has n to m carbon atoms. In some embodiments, the alkyl group has 1 to 6, 1 to 4, or 1 to 3 carbon atoms.

As used herein, the term “cyano-C_(1-n) alkyl” refers to a group of formula —(C_(1-n) alkylene)-CN, wherein the alkyl group has 1 to n carbon atoms. In some embodiments, the alkyl group has 1 to 6, 1 to 4, or 1 to 3 carbon atoms, e.g., —(C₁₋₃ alkylene)-CN.

As used herein, the term “HO—C_(1-n) alkyl” refers to a group of formula —(C_(1-n) alkylene)-OH, wherein the alkyl group has 1 to n carbon atoms. In some embodiments, the alkyl group has 1 to 6, 1 to 4, or 1 to 3 carbon atoms, e.g., —(C₁₋₃ alkylene)-OH.

As used herein, the term “C_(1-n) alkoxy-C_(1-n) alkyl” refers to a group of formula —(C_(1-n) alkylene)-O(C_(1-n) alkyl), wherein the alkyl group has 1 to n carbon atoms. In some embodiments, the alkyl group has 1 to 6, 1 to 4, or 1 to 3 carbon atoms, e.g., —(C₁₋₆ alkylene)-O(C₁₋₆ alkyl).

As used herein, the term “carboxy” refers to a group of formula —C(O)OH.

As used herein, the term “di(C_(n-m)-alkyl)amino” refers to a group of formula —N(alkyl)₂, wherein the two alkyl groups each has, independently, n to m carbon atoms. In some embodiments, each alkyl group independently has 1 to 6, 1 to 4, or 1 to 3 carbon atoms.

As used herein, the term “di(C_(n-m)-alkyl)carbamyl” refers to a group of formula —C(O)N(alkyl)₂, wherein the two alkyl groups each has, independently, n to m carbon atoms. In some embodiments, each alkyl group independently has 1 to 6, 1 to 4, or 1 to 3 carbon atoms.

As used herein, the term “C_(n-m) alkylcarbonyloxy” is a group of formula —OC(O)-alkyl, wherein the alkyl group has n to m carbon atoms.

As used herein, “aminocarbonyloxy” is a group of formula —OC(O)—NH₂.

As used herein, “C_(n-m) alkylaminocarbonyloxy” is a group of formula —OC(O)—NH-alkyl, wherein the alkyl group has n to m carbon atoms.

As used herein, “di(C_(n-m)alkyl)aminocarbonyloxy” is a group of formula —OC(O)—N(alkyl)₂, wherein each alkyl group has, independently, n to m carbon atoms.

As used herein C_(n-m) alkoxycarbonylamino refers to a group of formula —NHC(O)—O-alkyl, wherein the alkyl group has n to m carbon atoms.

As used herein, “cycloalkyl” refers to non-aromatic cyclic hydrocarbons including cyclized alkyl and alkenyl groups. Cycloalkyl groups can include mono- or polycyclic (e.g., having at least 2 fused rings) groups, spirocycles, and bridged rings (e.g., a bridged bicycloalkyl group). Ring-forming carbon atoms of a cycloalkyl group can be optionally substituted by oxo or sulfido (e.g., C(O) or C(S)). Also included in the definition of cycloalkyl are moieties that have one or more aromatic rings fused (i.e., having a bond in common with) to the cycloalkyl ring, for example, benzo or thienyl derivatives of cyclopentane, cyclohexane, and the like. A cycloalkyl group containing a fused aromatic ring can be attached through any ring-forming atom including a ring-forming atom of the fused aromatic ring. Cycloalkyl groups can have 3, 4, 5, 6, 7, 8, 9, or 10 ring-forming carbons (i.e., C₃₋₁₀). In some embodiments, the cycloalkyl is a C₃₋₁₀ monocyclic or bicyclic cycloalkyl. In some embodiments, the cycloalkyl is a C₃₋₇ monocyclic cycloalkyl. In some embodiments, the cycloalkyl is a C₄₋₇ monocyclic cycloalkyl. In some embodiments, the cycloalkyl is a C₄₋₁₀ spirocycle or bridged cycloalkyl (e.g., a bridged bicycloalkyl group). Example cycloalkyl groups include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclopentenyl, cyclohexenyl, cyclohexadienyl, cycloheptatrienyl, norbornyl, norpinyl, norcarnyl, cubane, adamantane, bicyclo[1.1.1]pentyl, bicyclo[2.1.1]hexyl, bicyclo[2.2.1]heptanyl, bicyclo[3.1.1]heptanyl, bicyclo[2.2.2]octanyl, spiro[3.3]heptanyl, and the like. In some embodiments, cycloalkyl is cyclopropyl, cyclobutyl, cyclopentyl, or cyclohexyl.

As used herein, “heteroaryl” refers to a monocyclic or polycyclic (e.g., having at least 2 fused rings) aromatic heterocycle having at least one heteroatom ring member selected from N, O, S and B. In some embodiments, the heteroaryl ring has 1, 2, 3, or 4 heteroatom ring members independently selected from N, O, S and B. In some embodiments, any ring-forming N in a heteroaryl moiety can be an N-oxide. In some embodiments, the heteroaryl is a 5-10 membered monocyclic or bicyclic heteroaryl having 1, 2, 3, or 4 heteroatom ring members independently selected from N, O, S and B. In some embodiments, the heteroaryl is a 5-10 membered monocyclic or bicyclic heteroaryl having 1, 2, 3, or 4 heteroatom ring members independently selected from N, O, and S. In some embodiments, the heteroaryl is a 5-6 monocyclic heteroaryl having 1 or 2 heteroatom ring members independently selected from N, O, S and B. In some embodiments, the heteroaryl is a 5-6 monocyclic heteroaryl having 1 or 2 heteroatom ring members independently selected from N, O, and S. In some embodiments, the heteroaryl group contains 5-10 or 5-6 ring-forming atoms. In some embodiments, the heteroaryl group has 1 to 4 ring-forming heteroatoms, 1 to 3 ring-forming heteroatoms, 1 to 2 ring-forming heteroatoms or 1 ring-forming heteroatom. When the heteroaryl group contains more than one heteroatom ring member, the heteroatoms may be the same or different. Example heteroaryl groups include, but are not limited to, thienyl, furyl, pyrrolyl, imidazolyl, thiazolyl, oxazolyl, pyrazolyl, isothiazolyl, isoxazolyl, 1,2,3-triazolyl, tetrazolyl, 1,2,3-thiadiazolyl, 1,2,3-oxadiazolyl, 1,2,4-triazolyl, 1,2,4-thiadiazolyl, 1,2,4-oxadiazolyl, 1,3,4-triazolyl, 1,3,4-thiadiazolyl, 1,3,4-oxadiazolyl and 1,2-dihydro-1,2-azaborine, pyridinyl, pyrimidinyl, pyrazinyl, pyridazinyl, azolyl, isothiazole, triazole, thiadiazolyl, quinolinyl, isoquinolinyl, indolyl, benzothiophenyl, benzofuranyl, benzisoxazolyl, imidazo[1,2-b]thiazolyl, purinyl, triazinyl, thieno[3,2-b]pyridinyl, imidazo[1,2-a]pyridinyl, 1,5-naphthyridinyl, 1H-pyrazolo[4,3-b]pyridinyl, and the like.

As used herein, “heterocycloalkyl” refers to monocyclic or polycyclic heterocycles having at least one non-aromatic ring (saturated or partially unsaturated ring), wherein one or more of the ring-forming carbon atoms of the heterocycloalkyl is replaced by a heteroatom selected from N, O, S and B, wherein the ring-forming carbon atoms and heteroatoms of a heterocycloalkyl group can be optionally substituted by one or more oxo or sulfido (e.g., C(O), S(O), C(S), or S(O)₂, etc.). Heterocycloalkyl groups include monocyclic and polycyclic (e.g., having at least 2 fused rings) systems. Included in heterocycloalkyl are monocyclic and polycyclic 3-10 or 4-10 membered heterocycloalkyl groups. Heterocycloalkyl groups can also include spirocycles and bridged rings (e.g., a 5-10 membered bridged biheterocycloalkyl ring having one or more of the ring-forming carbon atoms replaced by a heteroatom selected from N, O, S and B). The heterocycloalkyl group can be attached through a ring-forming carbon atom or a ring-forming heteroatom. In some embodiments, the heterocycloalkyl group contains 0 to 3 double bonds. In some embodiments, the heterocycloalkyl group contains 0 to 2 double bonds. Also included in the definition of heterocycloalkyl are moieties that have one or more aromatic rings fused (i.e., having a bond in common with) to the non-aromatic heterocyclic ring, for example, benzo or thienyl derivatives of piperidine, morpholine, azepine, etc. A heterocycloalkyl group containing a fused aromatic ring can be attached through any ring-forming atom including a ring-forming atom of the fused aromatic ring. In some embodiments, the heterocycloalkyl group contains 3 to 10 ring-forming atoms, 4 to 10 ring-forming atoms, 3 to 7 ring-forming atoms, or 5 to 6 ring-forming atoms. In some embodiments, the heterocycloalkyl group has 1 to 4 heteroatoms, 1 to 3 heteroatoms, 1 to 2 heteroatoms or 1 heteroatom. In some embodiments, the heterocycloalkyl is a monocyclic 4-6 membered heterocycloalkyl having 1 or 2 heteroatoms independently selected from N, O, S and B and having one or more oxidized ring members.

In some embodiments, the heterocycloalkyl is a monocyclic or bicyclic 5-10 membered heterocycloalkyl having 1, 2, 3, or 4 heteroatoms independently selected from N, O, S and B and having one or more oxidized ring members. In some embodiments, the heterocycloalkyl is a monocyclic or bicyclic 5-10 membered heterocycloalkyl having 1, 2, 3, or 4 heteroatoms independently selected from N, O, and S and having one or more oxidized ring members. In some embodiments, the heterocycloalkyl is a monocyclic 5-6 membered heterocycloalkyl having 1, 2, 3, or 4 heteroatoms independently selected from N, O, and S and having one or more oxidized ring members. Example heterocycloalkyl groups include pyrrolidin-2-onyl, 1,3-isoxazolidin-2-onyl, pyridonyl, pyrimidonyl, pyranyl, tetrahydropyranyl, oxetanyl, azetidinyl, morpholinyl, thiomorpholinyl, piperazinyl, tetrahydrofuranyl, tetrahydrothienyl, piperidinyl, pyrrolidinyl, isoxazolidinyl, isothiazolidinyl, pyrazolidinyl, oxazolidinyl, thiazolidinyl, imidazolidinyl, azepanyl, 1,2,3,4-tetrahydroisoquinoline, benzazapene, azabicyclo[3.1.0]hexanyl, diazabicyclo[3.1.0]hexanyl, oxabicyclo[2.1.1]hexanyl, azabicyclo[2.2.1]heptanyl, diazabicyclo[2.2.1]heptanyl, azabicyclo[3.1.1]heptanyl, diazabicyclo[3.1.1]heptanyl, azabicyclo[3.2.1]octanyl, diazabicyclo[3.2.1]octanyl, oxabicyclo[2.2.2]octanyl, azabicyclo[2.2.2]octanyl, azaadamantanyl, diazaadamantanyl, oxa-adamantanyl, azaspiro[3.3]heptanyl, diazaspiro[3.3]heptanyl, oxa-azaspiro[3.3]heptanyl, azaspiro[3.4]octanyl, diazaspiro[3.4]octanyl, diazaspiro[3.4]octan-5-one, oxa-azaspiro[3.4]octanyl, azaspiro[2.5]octanyl, diazaspiro[2.5]octanyl, azaspiro[4.4]nonanyl, diazaspiro[4.4]nonanyl, oxa-azaspiro[4.4]nonanyl, azaspiro[4.5]decanyl, diazaspiro[4.5]decanyl, diazaspiro[4.4]nonanyl, oxa-diazaspiro[4.4]nonanyl and the like.

As used herein, “C_(o-p) cycloalkyl-C_(n-m) alkyl-” refers to a group of formula cycloalkyl-alkylene-, wherein the cycloalkyl has o to p carbon atoms and the alkylene linking group has n to m carbon atoms.

As used herein “C_(o-p) aryl-C_(n-m) alkyl-” refers to a group of formula aryl-alkylene-, wherein the aryl has o to p carbon atoms and the alkylene linking group has n to m carbon atoms.

As used herein, “heteroaryl-C_(n-m) alkyl-” refers to a group of formula heteroaryl-alkylene-, wherein alkylene linking group has n to m carbon atoms.

As used herein “heterocycloalkyl-C_(n-m) alkyl-” refers to a group of formula heterocycloalkyl-alkylene-, wherein alkylene linking group has n to m carbon atoms.

As used herein, an “alkyl linking group” is a bivalent straight chain or branched alkyl linking group (“alkylene group”). For example, “C_(o-p) cycloalkyl-C_(n-m) alkyl-”, “C_(o-p) aryl-C_(n-m) alkyl-”, “phenyl-C_(1-m) alkyl-”, “heteroaryl-C_(n-m) alkyl-”, and “heterocycloalkyl-C_(n-m) alkyl-” contain alkyl linking groups. Examples of “alkyl linking groups” or “alkylene groups” include methylene, ethan-1,1-diyl, ethan-1,2-diyl, propan-1,3-dilyl, propan-1,2-diyl, propan-1,1-diyl and the like.

At certain places, the definitions or embodiments refer to specific rings (e.g., an azetidine ring, a pyridine ring, etc.). Unless otherwise indicated, these rings can be attached to any ring member provided that the valency of the atom is not exceeded. For example, an azetidine ring may be attached at any position of the ring, whereas a pyridin-3-yl ring is attached at the 3-position.

As used herein, the term “oxo” refers to an oxygen atom (i.e., ═O) as a divalent substituent, forming a carbonyl group when attached to a carbon (e.g., C═O or C(O)), or attached to a nitrogen or sulfur heteroatom forming a nitroso, sulfinyl or sulfonyl group.

The compounds described herein can be asymmetric (e.g., having one or more stereocenters). All stereoisomers, such as enantiomers and diastereomers, are intended unless otherwise indicated. Compounds of the present disclosure that contain asymmetrically substituted carbon atoms can be isolated in optically active or racemic forms. Methods on how to prepare optically active forms from optically inactive starting materials are known in the art, such as by resolution of racemic mixtures or by stereoselective synthesis. Many geometric isomers of olefins, C═N double bonds, and the like can also be present in the compounds described herein, and all such stable isomers are contemplated in the present invention. Cis and trans geometric isomers of the compounds of the present disclosure are described and may be isolated as a mixture of isomers or as separated isomeric forms. In some embodiments, the compound has the (R)-configuration. In some embodiments, the compound has the (S)-configuration. The Formulas (e.g., Formula (I), (II), etc.) provided herein include stereoisomers of the compounds.

Resolution of racemic mixtures of compounds can be carried out by any of numerous methods known in the art. An example method includes fractional recrystallizaion using a chiral resolving acid which is an optically active, salt-forming organic acid. Suitable resolving agents for fractional recrystallization methods are, for example, optically active acids, such as the D and L forms of tartaric acid, diacetyltartaric acid, dibenzoyltartaric acid, mandelic acid, malic acid, lactic acid or the various optically active camphorsulfonic acids such as β-camphorsulfonic acid. Other resolving agents suitable for fractional crystallization methods include stereoisomerically pure forms of α-methylbenzylamine (e.g., S and R forms, or diastereomerically pure forms), 2-phenylglycinol, norephedrine, ephedrine, N-methylephedrine, cyclohexylethylamine, 1,2-diaminocyclohexane, and the like.

Resolution of racemic mixtures can also be carried out by elution on a column packed with an optically active resolving agent (e.g., dinitrobenzoylphenylglycine). Suitable elution solvent composition can be determined by one skilled in the art.

Compounds provided herein also include tautomeric forms. Tautomeric forms result from the swapping of a single bond with an adjacent double bond together with the concomitant migration of a proton. Tautomeric forms include prototropic tautomers which are isomeric protonation states having the same empirical formula and total charge. Example prototropic tautomers include ketone-enol pairs, amide-imidic acid pairs, lactam-lactim pairs, enamine-imine pairs, and annular forms where a proton can occupy two or more positions of a heterocyclic system, for example, 1H- and 3H-imidazole, 1H-, 2H- and 4H-1,2,4-triazole, 1H- and 2H-isoindole, 2-hydroxypyridine and 2-pyridone, and 1H- and 2H-pyrazole. Tautomeric forms can be in equilibrium or sterically locked into one form by appropriate substitution.

All compounds, and pharmaceutically acceptable salts thereof, can be found together with other substances such as water and solvents (e.g. hydrates and solvates) or can be isolated.

In some embodiments, preparation of compounds can involve the addition of acids or bases to affect, for example, catalysis of a desired reaction or formation of salt forms such as acid addition salts.

In some embodiments, the compounds provided herein, or salts thereof, are substantially isolated. By “substantially isolated” is meant that the compound is at least partially or substantially separated from the environment in which it was formed or detected. Partial separation can include, for example, a composition enriched in the compounds provided herein. Substantial separation can include compositions containing at least about 50%, at least about 60%, at least about 70%, at least about 80%, at least about 90%, at least about 95%, at least about 97%, or at least about 99% by weight of the compounds provided herein, or salt thereof. Methods for isolating compounds and their salts are routine in the art.

The term “compound” as used herein is meant to include all stereoisomers, geometric isomers, tautomers, and isotopes of the structures depicted. Compounds herein identified by name or structure as one particular tautomeric form are intended to include other tautomeric forms unless otherwise specified.

The phrase “pharmaceutically acceptable” is employed herein to refer to those compounds, materials, compositions, and/or dosage forms which are, within the scope of sound medical judgment, suitable for use in contact with the tissues of human beings and animals without excessive toxicity, irritation, allergic response, or other problem or complication, commensurate with a reasonable benefit/risk ratio.

The present application also includes pharmaceutically acceptable salts of the compounds described herein. The present disclosure also includes pharmaceutically acceptable salts of the compounds described herein. As used herein, “pharmaceutically acceptable salts” refers to derivatives of the disclosed compounds wherein the parent compound is modified by converting an existing acid or base moiety to its salt form. Examples of pharmaceutically acceptable salts include, but are not limited to, mineral or organic acid salts of basic residues such as amines; alkali or organic salts of acidic residues such as carboxylic acids; and the like. The pharmaceutically acceptable salts of the present disclosure include the conventional non-toxic salts of the parent compound formed, for example, from non-toxic inorganic or organic acids. The pharmaceutically acceptable salts of the present disclosure can be synthesized from the parent compound which contains a basic or acidic moiety by conventional chemical methods. Generally, such salts can be prepared by reacting the free acid or base forms of these compounds with a stoichiometric amount of the appropriate base or acid in water or in an organic solvent, or in a mixture of the two; generally, non-aqueous media like ether, ethyl acetate, alcohols (e.g., methanol, ethanol, iso-propanol, or butanol) or acetonitrile (ACN) are preferred. Lists of suitable salts are found in Remington's Pharmaceutical Sciences, 17th ed., Mack Publishing Company, Easton, Pa., 1985, p. 1418 and Journal of Pharmaceutical Science, 66, 2 (1977), each of which is incorporated herein by reference in its entirety.

Synthesis

As will be appreciated, the compounds provided herein, including salts and stereoisomers thereof, can be prepared using known organic synthesis techniques and can be synthesized according to any of numerous possible synthetic routes.

The reactions for preparing compounds described herein can be carried out in suitable solvents which can be readily selected by one of skill in the art of organic synthesis. Suitable solvents can be substantially non-reactive with the starting materials (reactants), the intermediates or products at the temperatures at which the reactions are carried out, e.g., temperatures which can range from the solvent's freezing temperature to the solvent's boiling temperature. A given reaction can be carried out in one solvent or a mixture of more than one solvent. Depending on the particular reaction step, suitable solvents for a particular reaction step can be selected by the skilled artisan.

The expressions, “ambient temperature” or “room temperature” or “rt” as used herein, are understood in the art, and refer generally to a temperature, e.g., a reaction temperature, that is about the temperature of the room in which the reaction is carried out, for example, a temperature from about 20° C. to about 30° C.

Preparation of compounds described herein can involve the protection and deprotection of various chemical groups. The need for protection and deprotection, and the selection of appropriate protecting groups, can be readily determined by one skilled in the art. The chemistry of protecting groups can be found, for example, e.g., Wuts et al., Protective Groups in Organic Synthesis, 4th Ed., (Wiley, 2006).

Reactions can be monitored according to any suitable method known in the art. For example, product formation can be monitored by spectroscopic means, such as nuclear magnetic resonance spectroscopy (e.g., 1H or 13C), infrared spectroscopy, spectrophotometry (e.g., UV-visible), mass spectrometry or by chromatographic methods such as high performance liquid chromatography (HPLC), liquid chromatography-mass spectroscopy (LCMS), or thin layer chromatography (TLC). Compounds can be purified by those skilled in the art by a variety of methods, including high performance liquid chromatography (HPLC) and normal phase silica chromatography.

The Schemes below provide general guidance in connection with preparing the compounds of the invention. One skilled in the art would understand that the preparations shown in the Schemes can be modified or optimized using general knowledge of organic chemistry to prepare various compounds of the invention.

Compounds of formula 1-8 can be prepared via the synthetic route outlined in Scheme 1. Condensation of commercially available starting material 1-1 with carbonyl adduct 1-2 at elevated temperature generates a bicyclic compound, which can then be reduced with a suitable reductant (e.g., DIABL-H) to afford alcohol 1-3. Compound 1-3 can be coupled to a compound of formula 1-4, in which M is a boronic acid, boronic ester or an appropriately substituted metal [e.g., M is B(OR)₂, Sn(Alkyl)₃, or Zn-Hal], under standard Suzuki cross-coupling conditions (e.g., in the presence of a palladium catalyst and a suitable base), or standard Stille cross-coupling conditions (e.g., in the presence of a palladium catalyst), or standard Negishi cross-coupling conditions (e.g., in the presence of a palladium catalyst), to give intermediate 1-5. Halogenation of 1-5 with an appropriate reagent, such as phosphorous tribromide (PBr₃), affords compound 1-6 (Hal is a halide, such as F, Cl, Br, or I). Compound of formula 1-8 can then be prepared by coupling of compound 1-6 with an adduct of formula 1-7, in which M is a boronic acid, boronic ester or an appropriately substituted metal [e.g., M is B(OR)₂, Sn(Alkyl)₃, or Zn-Hal], under standard Suzuki cross-coupling conditions (e.g., in the presence of a palladium catalyst and a suitable base), or standard Stille cross-coupling conditions (e.g., in the presence of a palladium catalyst), or standard Negishi cross-coupling conditions (e.g., in the presence of a palladium catalyst).

Compounds of formula 2-8 can be prepared via the synthetic route outlined in Scheme 2. An aromatic amine 2-1 (Hal is a halide, such as F, Cl, Br, or I) was first reacted with a suitable coupling reagent 1-4, in which M is a boronic acid, boronic ester or an appropriately substituted metal [e.g., M is B(OR)₂, Sn(Alkyl)₃, or Zn-Hal], under standard Suzuki cross-coupling conditions (e.g., in the presence of a palladium catalyst and a suitable base), or standard Stille cross-coupling conditions (e.g., in the presence of a palladium catalyst), or standard Negishi cross-coupling conditions (e.g., in the presence of a palladium catalyst), to give intermediate 2-2. Reaction of 2-2 with hydrazide 2-3 under suitable conditions yields 2-4. Hydrazide 2-4 is then cyclized at elevated temperature in the presence of an appropriate reagent, such as N,O-bis(trimethylsilyl)acetamide, to generate product 2-5. Halogenation reaction of 2-5 using a suitable reagent (e.g., N-bromosuccinimide) gives 2-6. Compound 2-6 can be coupled to an adduct of formula 2-7 to afford product 2-8, using procedures similar to that described for the preparation of 2-2 from 2-1.

Compounds of formula 3-8 can be prepared via the synthetic route outlined in Scheme 3. Reaction of 2-2 (prepared in Scheme 2, Hal is a halide, such as F, Cl, Br, or I) with hydrazide 3-1 (PG is an appropriate protecting group, such as methyl or ethyl) under suitable conditions yields 3-2. Hydrazide 3-2 is then cyclized at elevated temperature in the presence of an appropriate reagent, such as N,O-bis(trimethylsilyl)acetamide, to generate product 3-3. Halogenation of 3-3 using a suitable reagent (e.g., N-bromosuccinimide) gives 3-4. Compound 3-4 can be coupled to an adduct of formula 2-7, in which M is a boronic acid, boronic ester or an appropriately substituted metal [e.g., M is B(OR)₂, Sn(Alkyl)₃, or Zn-Hal], under standard Suzuki cross-coupling conditions (e.g., in the presence of a palladium catalyst and a suitable base), or standard Stille cross-coupling conditions (e.g., in the presence of a palladium catalyst), or standard Negishi cross-coupling conditions (e.g., in the presence of a palladium catalyst), to give intermediate 3-5. Hydrolysis of ester 3-5 under suitable conditions, such as in the presence of a base (e.g., NaOH), gives carboxylic acid 3-6. Intermediate 3-6 then undergoes an amide coupling reaction with amine 3-7 to afford product 3-8 under appropriate conditions, such as using a coupling reagent (e.g., BOP) in the presence of a base (e.g., DIPEA).

Compound of formula 4-8 can be synthesized via the synthetic route outlined in Scheme 4. Substituting one chlorine atom in 4-1 with amine 4-2 (PG represents a suitable protecting group) affords compound 4-3. Compound 4-3 can then be cyclized to intermediate 4-4 via appropriate chemical transformations, such as a two-step sequence using O-ethyl carbonisothiocyanatidate and hydroxylamine hydrochoride. A coupling reaction between 4-4 and a reagent of formula 1-4, in which M is a boronic acid, boronic ester or an appropriately substituted metal [e.g., M is B(OR)₂, Sn(Alkyl)₃, or Zn-Hal], under standard Suzuki cross-coupling conditions (e.g., in the presence of a palladium catalyst and a suitable base), or standard Stille cross-coupling conditions (e.g., in the presence of a palladium catalyst), or standard Negishi cross-coupling conditions (e.g., in the presence of a palladium catalyst), will generate intermediate 4-5. A subsequent coupling reaction between 4-5 and 4-6 (Hal is a halide, such as F, Cl, Br, or I) yields adduct of formula 4-7 under appropriate conditions, such as Buchwald-Hartwig coupling conditions in the presence of a palladium catalyst (e.g., chloro(2-dicyclohexylphosphino-2′,4′,6′-triisopropyl-1,1′-biphenyl)[2-(2′-amino-1,1′-biphenyl)]palladium(II)) and a base (e.g., sodium tert-butoxide). Subsequent removal of the protecting groups in 4-7 under suitable conditions then generates the product of formula 4-8.

Compounds of formula 5-4 can be synthesized via the synthetic route outlined in Scheme 5. Advanced intermediate 5-1 (which can be prepared using synthetic procedures as outlined in Scheme 2) first undergoes a dihydroxylation reaction in the presence of a suitable reagent, such as osmium(IV) tetroxide, followed by oxidative cleavage to produce aldehyde 5-2. The final product 5-4 can be prepared by an amination reaction between 5-2 and an amine of formula 5-3 under standard reductive amination conditions (e.g., in the presence of a borohydride reducing agent).

Compounds of formula 6-5 can be synthesized via the synthetic route outlined in Scheme 6. Advanced intermediate 4-5 (which can be prepared using synthetic procedures as outlined in Scheme 4) undergoes an amination reaction with an aldehyde 6-1 under reductive amination conditions (e.g., in the presence of a borohydride reducing agent) to give 6-2. A coupling reaction between 6-2 and a reagent of formula 6-3, in which M is a boronic acid, boronic ester or an appropriately substituted metal [e.g., M is B(OR)₂, Sn(Alkyl)₃, or Zn-Hal], under standard Suzuki cross-coupling conditions (e.g., in the presence of a palladium catalyst and a suitable base), or standard Stille cross-coupling conditions (e.g., in the presence of a palladium catalyst), or standard Negishi cross-coupling conditions (e.g., in the presence of a palladium catalyst), will generate intermediate 6-4. Subsequent removal of the protecting groups in 6-4 under suitable conditions then generates the product of formula 6-5.

Methods of Use

The compounds of the present disclosure can modulate the activity of adenosine receptors, such as subtypes A2A and A2B receptors. Accordingly, the compounds, salts or stereoisomers described herein can be used in methods of inhibiting adenosine receptors (e.g., A2A and/or A2B receptors) by contacting the receptor with any one or more of the compounds, salts, or compositions described herein. In some embodiments, the compounds or salts can be used in methods of inhibiting activity of an adenosine receptor in an individual/patient in need of the inhibition by administering an effective amount of a compound or salt of described herein. In some embodiments, modulating is inhibiting. In some embodiments, the contacting is in vivo. In some embodiments, the contacting is ex vivo or in vitro.

The compounds or salts described herein can be selective. By “selective,” it is meant that the compound binds to or inhibits an adenosine receptor with greater affinity or potency, respectively, compared to at least one other receptor, kinase, etc. The compounds of the present disclosure can also be dual antagonists (i.e., inhibitors) of adenosine receptors, e.g., A2A and A2B adenosine receptors.

Another aspect of the present disclosure pertains to methods of treating an adenosine receptor associated disease or disorder in an individual (e.g., patient) by administering to the individual in need of such treatment a therapeutically effective amount or dose of one or more compounds of the present disclosure or a pharmaceutical composition thereof. An adenosine receptor associated disease or disorder can include any disease, disorder or condition that is directly or indirectly linked to expression or activity of the adenosine receptor, including overexpression and/or abnormal activity levels.

The compounds of the present disclosure are useful in the treatment of diseases related to the activity of adenosine receptors including, for example, cancer, inflammatory diseases, cardiovascular diseases, neurodegenerative diseases, immunomodulatory disorders, central nerve system diseases, and diabetes.

Based on the compelling roles of adenosine, e.g., A2A, A2B, receptors in multiple immunosuppressive mechanisms, developing inhibitors can boost immune system to suppress tumor progression. Adenosine receptor inhibitors can be used to treat, alone or in combination with other therapies, bladder cancer, lung cancer (e.g., non-small cell lung cancer (NSCLC), lung metastasis), melanoma (e.g., metastatic melanoma), breast cancer, cervical cancer, ovarian cancer, colorectal cancer, pancreatic cancer, esophageal cancer, prostate cancer, kidney cancer, skin cancer, thyroid cancer, liver cancer, uterine cancer, head and neck cancer, and renal cell carcinoma (Antonioli, L. et al., Nature Reviews Cancer, 2013, 13, 842-857). See also, https://globenewswire.com/news-release/2017/04/04/954192/0/en/Corvus-Pharmaceuticals-Announce s-Interim-Results-from-Ongoing-Phase-1-1b-Study-Demonstrating-Safety-and-Clinical-Activity-of-Lead-Checkpoint-Inhibitor-CPI-444-in-Patients-with-Adva.html; Cekic C. et al., J Immunol, 2012, 188:198-205; Iannone, R. et al., Am. J. Cancer Res. 2014, 4:172-181 (study shows that both A2A and CD73 blockade enhance the antitumor activity of anti-CTLA-4 mAb therapy in a B16F10 murine melanoma model); Iannone, R. et al., Neoplasia, 2013, 15:1400-1410 and Beavis P A., et al., Proc Natl Acad Sci. USA, 2013, 110:14711-14716 (study shows that A2A and CD73 blockade decreased metastasis in 4T1 breast tumor model with has high CD73 expression). In some embodiments, the prostate cancer is metastatic castrate-resistant prostate carcinoma (mCRPC). In some embodiments, the colorectal cancer is colorectal carcinoma (CRC).

In some embodiments, the disease or disorder is lung cancer (e.g., non-small cell lung cancer), melanoma, pancreatic cancer, breast cancer, head and neck squamous cell carcinoma, prostate cancer, liver cancer, color cancer, endometrial cancer, bladder cancer, skin cancer, cancer of the uterus, renal cancer, gastric cancer, or sarcoma. In some embodiments, the sarcoma is Askin's tumor, sarcoma botryoides, chondrosarcoma, Ewing's sarcoma, malignant hemangioendothelioma, malignant schwannoma, osteosarcoma, alveolar soft part sarcoma, angiosarcoma, cystosarcoma phyllodes, dermatofibrosarcoma protuberans, desmoid tumor, desmoplastic small round cell tumor, epithelioid sarcoma, extraskeletal chondrosarcoma, extraskeletal osteosarcoma, fibrosarcoma, gastrointestinal stromal tumor (GIST), hemangiopericytoma, hemangiosarcoma, Kaposi's sarcoma, leiomyosarcoma, liposarcoma, lymphangiosarcoma, lymphosarcoma, malignant peripheral nerve sheath tumor (MPNST), neurofibrosarcoma, rhabdomyosarcoma, synovial sarcoma, or undifferentiated pleomorphic sarcoma.

In some embodiments, the disease or disorder is mesothelioma or adrenocarcinoma. In some embodiments, the disease or disorder is mesothelioma. In some embodiments, the disease or disorder is adrenocarcinoma.

MDSC (myeloid-derived suppressor cells) are a heterogenous group of immune cells from the myeloid lineage (a family of cells that originate from bone marrow stem cells). MDSCs strongly expand in pathological situations such as chronic infections and cancer, as a result of an altered haematopoiesis. MDSCs are discriminated from other myeloid cell types in which they possess strong immunosuppressive activities rather than immunostimulatory properties. Similar to other myeloid cells, MDSCs interact with other immune cell types including T cells, dendritic cells, macrophages and natural killer cells to regulate their functions. In some embodiments, the compounds, etc. described herein can be used in methods related to cancer tissue (e.g., tumors) with high infiltration of MDSCs, including solid tumors with high basal level of macrophage and/or MDSC infiltration.

In some embodiments, the compounds of the disclosure can be used in treating pulmonary inflammation, including bleomycin-induced pulmonary fibrosis and injury related to adenosine deaminase deficiency (Baraldi, et al., Chem. Rev., 2008, 108, 238-263).

In some embodiments, the compounds of the disclosure can be used as a treatment for inflammatory disease such as allergic reactions (e.g., A2B adenosine receptor dependent allergic reactions) and other adenosine receptor dependent immune reactions. Further inflammatory diseases that can be treated by compounds of the disclosure include respiratory disorders, sepsis, reperfusion injury, and thrombosis.

In some embodiments, the compounds of the disclosure can be used as a treatment for cardiovascular disease such as coronary artery disease (myocardial infarction, angina pectoris, heart failure), cerebrovascular disease (stroke, transient ischemic attack), peripheral artery disease, and aortic atherosclerosis and aneurysm. Atherosclerosis is an underlying etiologic factor in many types of cardiovascular disease. Atherosclerosis begins in adolescence with fatty streaks, which progress to plaques in adulthood and finally results in thrombotic events that cause occlusion of vessels leading to clinically significant morbidity and mortality. Antagonists to the A2B adenosine receptor and A2A adenosine receptor may be beneficial in preventing atherosclerotic plaque formation (Eisenstein, A. et al., J. Cell Physiol., 2015, 230(12), 2891-2897).

In some embodiments, the compounds of the disclosure can be used as a treatment for disorders in motor activity; deficiency caused by degeneration of the striatonigral dopamine system; and Parkinson's disease; some of the motivational symptoms of depression (Collins, L. E. et al. Pharmacol. Biochem. Behav., 2012, 100, 498-505.).

In some embodiments, the compounds of the disclosure can be used as a treatment for diabetes and related disorders, such as insulin resistance. Diabetes affects the production of adenosine and the expression of A2B adenosine receptors (A2BRs) that stimulate IL-6 and CRP production, insulin resistance, and the association between A_(2B)R gene single-nucleotide polymorphisms (ADORA2B SNPs) and inflammatory markers. The increased A2BR signaling in diabetes may increase insulin resistance in part by elevating pro-inflammatory mediators. Selective A2BR blockers may be useful to treat insulin resistance (Figler, R. A. et al. Diabetes, 2011, 60 (2), 669-679).

It is believed that compounds of Formula (I), or any of the embodiments thereof, may possess satisfactory pharmacological profile and promising biopharmaceutical properties, such as toxicological profile, metabolism and pharmacokinetic properties, solubility, and permeability. It will be understood that determination of appropriate biopharmaceutical properties is within the knowledge of a person skilled in the art, e.g., determination of cytotoxicity in cells or inhibition of certain targets or channels to determine potential toxicity.

The terms “individual” or “patient,” used interchangeably, refer to any animal, including mammals, preferably mice, rats, other rodents, rabbits, dogs, cats, swine, cattle, sheep, horses, or primates, and most preferably humans.

The phrase “therapeutically effective amount” refers to the amount of active compound or pharmaceutical agent that elicits the biological or medicinal response in a tissue, system, animal, individual or human that is being sought by a researcher, veterinarian, medical doctor or other clinician.

As used herein, the term “treating” or “treatment” refers to one or more of (1) inhibiting the disease; e.g., inhibiting a disease, condition or disorder in an individual who is experiencing or displaying the pathology or symptomatology of the disease, condition or disorder (i.e., arresting further development of the pathology and/or symptomatology); and (2) ameliorating the disease; e.g., ameliorating a disease, condition or disorder in an individual who is experiencing or displaying the pathology or symptomatology of the disease, condition or disorder (i.e., reversing the pathology and/or symptomatology) such as decreasing the severity of disease.

In some embodiments, the compounds of the invention are useful in preventing or reducing the risk of developing any of the diseases referred to herein; e.g., preventing or reducing the risk of developing a disease, condition or disorder in an individual who may be predisposed to the disease, condition or disorder but does not yet experience or display the pathology or symptomatology of the disease.

Combination Therapies

I. Immune-Checkpoint Therapies

In some embodiments, A2A and A2B dual inhibitors provided herein can be used in combination with one or more immune checkpoint inhibitors for the treatment of cancer as described herein. In one embodiment, the combination with one or more immune checkpoint inhibitors as described herein can be used for the treatment of melanoma. Compounds of the present disclosure can be used in combination with one or more immune checkpoint inhibitors. Exemplary immune checkpoint inhibitors include inhibitors against immune checkpoint molecules such as CBL-B, CD20, CD28, CD40, CD122, CD96, CD73, CD47, GITR, CSF1R, JAK, PI3K delta, PI3K gamma, TAM, arginase, HPK1, CD137 (also known as 4-1BB), ICOS, B7-H3, B7-H4, BTLA, CTLA-4, LAG3, TIM3, VISTA, TIGIT, PD-1, PD-L1 and PD-L2. In some embodiments, the immune checkpoint molecule is a stimulatory checkpoint molecule selected from CD27, CD28, CD40, ICOS, OX40, GITR and CD137. In some embodiments, the immune checkpoint molecule is an inhibitory checkpoint molecule selected from A2AR, B7-H3, B7-H4, BTLA, CTLA-4, IDO, KIR, LAG3, PD-1, TIM3, TIGIT, and VISTA. In some embodiments, the compounds of the disclosure provided herein can be used in combination with one or more agents selected from KIR inhibitors, TIGIT inhibitors, LAIR1 inhibitors, CD160 inhibitors, 2B4 inhibitors and TGFR beta inhibitors.

In some embodiments, the A2A and A2B dual inhibitors provided herein can be used in combination with one or more agonists of immune checkpoint molecules, e.g., OX40, CD27, GITR, and CD137 (also known as 4-1BB).

In some embodiments, the inhibitor of an immune checkpoint molecule is anti-PD1 antibody, anti-PD-L1 antibody, or anti-CTLA-4 antibody.

In some embodiments, the inhibitor of an immune checkpoint molecule is an inhibitor of PD-1, e.g., an anti-PD-1 monoclonal antibody. In some embodiments, the anti-PD-1 monoclonal antibody is nivolumab, pembrolizumab (also known as MK-3475), durvalumab (Imfinzi®), pidilizumab, SHR-1210, PDR001, MGA012, PDR001, AB122, or AMP-224. In some embodiments, the anti-PD-1 monoclonal antibody is nivolumab or pembrolizumab. In some embodiments, the anti-PD1 antibody is pembrolizumab. In some embodiments, the anti-PD-1 monoclonal antibody is MGA012. In some embodiments, the anti-PD1 antibody is SHR-1210. Other anti-cancer agent(s) include antibody therapeutics such as 4-1BB (e.g. urelumab, utomilumab.

In some embodiments, the inhibitor of an immune checkpoint molecule is an inhibitor of PD-L1, e.g., an anti-PD-L1 monoclonal antibody. In some embodiments, the anti-PD-L1 monoclonal antibody is BMS-935559, MEDI4736, MPDL3280A (also known as RG7446), or MSB0010718C. In some embodiments, the anti-PD-L1 monoclonal antibody is MPDL3280A or MEDI4736.

In some embodiments, the inhibitor of an immune checkpoint molecule is an inhibitor of PD-1 and PD-L1, e.g., an anti-PD-1/PD-L1 monoclonal antibody. In some embodiments, the anti-PD-1/PD-L1 is MCLA-136.

In some embodiments, the inhibitor is MCLA-145.

In some embodiments, the inhibitor of an immune checkpoint molecule is an inhibitor of CTLA-4, e.g., an anti-CTLA-4 antibody. In some embodiments, the anti-CTLA-4 antibody is ipilimumab, tremelimumab, AGEN1884, or CP-675,206.

In some embodiments, the inhibitor of an immune checkpoint molecule is an inhibitor of LAG3, e.g., an anti-LAG3 antibody. In some embodiments, the anti-LAG3 antibody is BMS-986016, LAG525, or INCAGN2385.

In some embodiments, the inhibitor of an immune checkpoint molecule is an inhibitor of TIM3, e.g., an anti-TIM3 antibody. In some embodiments, the anti-TIM3 antibody is INCAGN2390, MBG453, or TSR-022.

In some embodiments, the inhibitor of an immune checkpoint molecule is an inhibitor of GITR, e.g., an anti-GITR antibody. In some embodiments, the anti-GITR antibody is TRX518, MK-4166, INCAGN1876, MK-1248, AMG228, BMS-986156, GWN323, or MEDI1873.

In some embodiments, the inhibitor of an immune checkpoint molecule is an agonist of OX40, e.g., OX40 agonist antibody or OX40L fusion protein. In some embodiments, the anti-OX40 antibody is MEDI0562, MOXR-0916, PF-04518600, GSK3174998, or BMS-986178. In some embodiments, the OX40L fusion protein is MEDI6383.

In some embodiments, the inhibitor of an immune checkpoint molecule is an inhibitor of CD20, e.g., an anti-CD20 antibody. In some embodiments, the anti-CD20 antibody is obinutuzumab or rituximab.

The compounds of the present disclosure can be used in combination with bispecific antibodies. In some embodiments, one of the domains of the bispecific antibody targets PD-1, PD-L1, CTLA-4, GITR, OX40, TIM3, LAG3, CD137, ICOS, CD3 or TGFβ receptor.

In some embodiments, the compounds of the disclosure can be used in combination with one or more metabolic enzyme inhibitors. In some embodiments, the metabolic enzyme inhibitor is an inhibitor of IDO1, TDO, or arginase. Examples of IDO1 inhibitors include epacadostat, NLG919, BMS-986205, PF-06840003, IOM2983, RG-70099 and LY338196.

As provided throughout, the additional compounds, inhibitors, agents, etc. can be combined with the present compound in a single or continuous dosage form, or they can be administered simultaneously or sequentially as separate dosage forms.

II. Cancer Therapies

Cancer cell growth and survival can be impacted by multiple signaling pathways. Thus, it is useful to combine different enzyme/protein/receptor inhibitors, exhibiting different preferences in the targets which they modulate the activities of, to treat such conditions. Targeting more than one signaling pathway (or more than one biological molecule involved in a given signaling pathway) may reduce the likelihood of drug-resistance arising in a cell population, and/or reduce the toxicity of treatment.

The compounds of the present disclosure can be used in combination with one or more other enzyme/protein/receptor inhibitors or one or more therapies for the treatment of diseases, such as cancer. Examples of diseases and indications treatable with combination therapies include those as described herein.

One or more additional pharmaceutical agents such as, for example, chemotherapeutics, immune-oncology agents, metabolic enzyme inhibitors, chemokine receptor inhibitors, and phosphatase inhibitors, as well as targeted therapies such as Bcr-Abl, Flt-3, EGFR, HER2, JAK, c-MET, VEGFR, PDGFR, c-Kit, IGF-1R, RAF, ALK, CDK, and FAK kinase inhibitors can be used in combination with the compounds of the present disclosure for treatment of adenosine associated diseases, disorders or conditions. Other agents such as therapeutic antibodies can be used in combination with the compounds of the present disclosure for treatment of adenosine associated diseases, disorders or conditions. The one or more additional pharmaceutical agents can be administered to a patient simultaneously or sequentially.

Example antibodies for use in combination therapy include but are not limited to Trastuzumab (e.g. anti-HER2), Ranibizumab (e.g. anti-VEGF-A), Bevacizumab (trade name Avastin, e.g. anti-VEGF, Panitumumab (e.g. anti-EGFR), Cetuximab (e.g. anti-EGFR), Rituxan (anti-CD20) and antibodies directed to c-MET.

One or more of the following agents may be used in combination with the compounds of the present disclosure and are presented as a non-limiting list: a cytostatic agent, taxotere, taxol, camptostar, epothilones, 5-fluorouracil, SCH 66336, R115777, L778,123, BMS 214662, IRESSA™ (gefitinib), TARCEVA™ (erlotinib), antibodies to EGFR, GLEEVEC™ (imatinib mesylate), intron, ara-C, adriamycin, cytoxan, chlormethine, triethylenemelamine, triethylenethiophosphoramine, busulfan, 6-mercaptopurine, 6-thioguanine, fludarabine phosphate, ELOXATIN™ (oxaliplatin), vindesine, mithramycin, deoxycoformycin, L-asparaginase, 17 alpha-ethinylestradiol, diethylstilbestrol, testosterone, prednisone, fluoxymesterone, methylprednisolone, methyltestosterone, prednisolone, triamcinolone, chlorotrianisene, hydroxyprogesterone, aminoglutethimide, medroxyprogesteroneacetate, leuprolide, flutamide, goserelin, hydroxyurea, amsacrine, navelbene, reloxafine, droloxafine, hexamethylmelamine, avastin, HERCEPTIN™ (trastuzumab), BEXXAR™ (tositumomab), VELCADE™ (bortezomib), ZEVALIN™ (ibritumomab tiuxetan), TRISENOX™ (arsenic trioxide), XELODA™ (capecitabine), vinorelbine, porfimer, ERBITUX™ (cetuximab), aphidicolon, rituxan, Smll, triapine, didox, trimidox, amidox, 3-AP, and MDL-101, 731.

The compounds of the present disclosure can further be used in combination with other methods of treating cancers, for example by chemotherapy, irradiation therapy, tumor-targeted therapy, adjuvant therapy, immunotherapy or surgery. Examples of immunotherapy include cytokine treatment (e.g., interferons, GM-CSF, G-CSF, IL-2), CRS-207 immunotherapy, cancer vaccine, monoclonal antibody, adoptive T cell transfer, Toll receptor agonists, STING agonists, oncolytic virotherapy and immunomodulating small molecules, including thalidomide or JAK1/2 inhibitor and the like. The compounds can be administered in combination with one or more anti-cancer drugs, such as a chemotherapeutics. Example chemotherapeutics include any of: abarelix, aldesleukin, alemtuzumab, alitretinoin, allopurinol, altretamine, anastrozole, arsenic trioxide, asparaginase, azacitidine, bevacizumab, bexarotene, baricitinib, bleomycin, bortezombi, bortezomib, busulfan intravenous, busulfan oral, calusterone, capecitabine, carboplatin, carmustine, cetuximab, chlorambucil, cisplatin, cladribine, clofarabine, cyclophosphamide, cytarabine, dacarbazine, dactinomycin, dalteparin sodium, dasatinib, daunorubicin, decitabine, denileukin, denileukin diftitox, dexrazoxane, docetaxel, doxorubicin, dromostanolone propionate, eculizumab, epirubicin, erlotinib, estramustine, etoposide phosphate, etoposide, exemestane, fentanyl citrate, filgrastim, floxuridine, fludarabine, fluorouracil, fulvestrant, gefitinib, gemcitabine, gemtuzumab ozogamicin, goserelin acetate, histrelin acetate, ibritumomab tiuxetan, idarubicin, ifosfamide, imatinib mesylate, interferon alfa 2a, irinotecan, lapatinib ditosylate, lenalidomide, letrozole, leucovorin, leuprolide acetate, levamisole, lomustine, meclorethamine, megestrol acetate, melphalan, mercaptopurine, methotrexate, methoxsalen, mitomycin C, mitotane, mitoxantrone, nandrolone phenpropionate, nelarabine, nofetumomab, olaparib, oxaliplatin, paclitaxel, pamidronate, panitumumab, pegaspargase, pegfilgrastim, pemetrexed disodium, pentostatin, pipobroman, plicamycin, procarbazine, quinacrine, rasburicase, rituximab, ruxolitinib, rucaparib, sorafenib, streptozocin, sunitinib, sunitinib maleate, tamoxifen, temozolomide, teniposide, testolactone, thalidomide, thioguanine, thiotepa, topotecan, toremifene, tositumomab, trastuzumab, tretinoin, uracil mustard, valrubicin, vinblastine, vincristine, vinorelbine, vorinostat, niraparib, veliparib, talazoparib, and zoledronate.

Additional examples of chemotherapeutics include proteosome inhibitors (e.g., bortezomib), thalidomide, revlimid, and DNA-damaging agents such as melphalan, doxorubicin, cyclophosphamide, vincristine, etoposide, carmustine, and the like.

Example Bcr-Abl inhibitors include imatinib mesylate (GLEEVAC™), nilotinib, dasatinib, bosutinib, and ponatinib, and pharmaceutically acceptable salts. Other example suitable Bcr-Abl inhibitors include the compounds, and pharmaceutically acceptable salts thereof, of the genera and species disclosed in U.S. Pat. No. 5,521,184, WO 04/005281, and U.S. Ser. No. 60/578,491.

Example suitable Flt-3 inhibitors include midostaurin, lestaurtinib, linifanib, sunitinib, sunitinib, maleate, sorafenib, quizartinib, crenolanib, pacritinib, tandutinib, PLX3397 and ASP2215, and their pharmaceutically acceptable salts. Other example suitable Flt-3 inhibitors include compounds, and their pharmaceutically acceptable salts, as disclosed in WO 03/037347, WO 03/099771, and WO 04/046120.

Example suitable RAF inhibitors include dabrafenib, sorafenib, and vemurafenib, and their pharmaceutically acceptable salts. Other example suitable RAF inhibitors include compounds, and their pharmaceutically acceptable salts, as disclosed in WO 00/09495 and WO 05/028444.

Example suitable FAK inhibitors include VS-4718, VS-5095, VS-6062, VS-6063, BI853520, and GSK2256098, and their pharmaceutically acceptable salts. Other example suitable FAK inhibitors include compounds, and their pharmaceutically acceptable salts, as disclosed in WO 04/080980, WO 04/056786, WO 03/024967, WO 01/064655, WO 00/053595, and WO 01/014402.

Example suitable CDK4/6 inhibitors include palbociclib, ribociclib, trilaciclib, lerociclib, and abemaciclib, and their pharmaceutically acceptable salts. Other example suitable CDK4/6 inhibitors include compounds, and their pharmaceutically acceptable salts, as disclosed in WO 09/085185, WO 12/129344, WO 11/101409, WO 03/062236, WO 10/075074, and WO 12/061156.

In some embodiments, a corticosteroid such as dexamethasone is administered to a patient in combination with the compounds of the disclosure where the dexamethasone is administered intermittently as opposed to continuously.

The compounds of Formula (I) or any of the formulas as described herein, a compound as recited in any of the claims and described herein, or salts thereof can be combined with another immunogenic agent, such as cancerous cells, purified tumor antigens (including recombinant proteins, peptides, and carbohydrate molecules), cells, and cells transfected with genes encoding immune stimulating cytokines. Non-limiting examples of tumor vaccines that can be used include peptides of melanoma antigens, such as peptides of gp100, MAGE antigens, Trp-2, MARTI and/or tyrosinase, or tumor cells transfected to express the cytokine GM-CSF.

The compounds of Formula (I) or any of the formulas as described herein, a compound as recited in any of the claims and described herein, or salts thereof can be used in combination with a vaccination protocol for the treatment of cancer. In some embodiments, the tumor cells are transduced to express GM-CSF. In some embodiments, tumor vaccines include the proteins from viruses implicated in human cancers such as Human Papilloma Viruses (HPV), Hepatitis Viruses (HBV and HCV) and Kaposi's Herpes Sarcoma Virus (KHSV). In some embodiments, the compounds of the present disclosure can be used in combination with tumor specific antigen such as heat shock proteins isolated from tumor tissue itself. In some embodiments, the compounds of Formula (I) or any of the formulas as described herein, a compound as recited in any of the claims and described herein, or salts thereof can be combined with dendritic cells immunization to activate potent anti-tumor responses.

The compounds of the present disclosure can be used in combination with bispecific macrocyclic peptides that target Fe alpha or Fe gamma receptor-expressing effectors cells to tumor cells. The compounds of the present disclosure can also be combined with macrocyclic peptides that activate host immune responsiveness.

In some further embodiments, combinations of the compounds of the disclosure with other therapeutic agents can be administered to a patient prior to, during, and/or after a bone marrow transplant or stem cell transplant. The compounds of the present disclosure can be used in combination with bone marrow transplant for the treatment of a variety of tumors of hematopoietic origin.

In some embodiments, the compounds of the disclosure can be used in combination with one or more other kinase inhibitors including imatinib, particularly for treating patients resistant to imatinib or other kinase inhibitors.

The compounds can be used in combination with tumor vaccines and CAR (Chimeric antigen receptor) T cell treatment as a booster for T cell activation (21). In some embodiments, tumor vaccines include the proteins from viruses implicated in human cancers such as Human Papilloma Viruses (HPV), Hepatitis Viruses (HBV and HCV) and Kaposi's Herpes Sarcoma Virus (KHSV). In some embodiments, the compounds of the present disclosure can be used in combination with tumor specific antigen such as heat shock proteins isolated from tumor tissue itself. In some embodiments, the compounds can be combined with dendritic cells immunization to activate potent anti-tumor responses.

Methods for the safe and effective administration of most of these chemotherapeutic agents are known to those skilled in the art. In addition, their administration is described in the standard literature. For example, the administration of many of the chemotherapeutic agents is described in the “Physicians' Desk Reference” (PDR, e.g., 1996 edition, Medical Economics Company, Montvale, N.J.), the disclosure of which is incorporated herein by reference as if set forth in its entirety.

III. Infections: Viral, Bacterial, Fungus or Parasite

The compounds of the present disclosure can be used in combination with one or more other inhibitors or one or more therapies for the treatment of infections. Examples of infections include viral infections, bacterial infections, fungus infections or parasite infections.

The compounds of Formula (I) or any of the formulas as described herein, a compound as recited in any of the claims and described herein, or salts thereof can be used in combination with vaccines, to stimulate the immune response to pathogens, toxins, and self antigens. Examples of pathogens for which this therapeutic approach may be particularly useful, include pathogens for which there is currently no effective vaccine, or pathogens for which conventional vaccines are less than completely effective. These include, but are not limited to, HIV, Hepatitis (A, B, & C), Influenza, Herpes, Giardia, Malaria, Leishmania, Staphylococcus aureus, Pseudomonas Aeruginosa.

Viruses causing infections treatable by methods of the present disclosure include, but are not limit to human papillomavirus, influenza, hepatitis A, B, C or D viruses, adenovirus, poxvirus, herpes simplex viruses, human cytomegalovirus, severe acute respiratory syndrome virus, ebola virus, measles virus, herpes virus (e.g., VZV, HSV-1, HAV-6, HSV-II, and CMV, Epstein Barr virus), flaviviruses, echovirus, rhinovirus, coxsackie virus, cornovirus, respiratory syncytial virus, mumpsvirus, rotavirus, measles virus, rubella virus, parvovirus, vaccinia virus, HTLV virus, dengue virus, papillomavirus, molluscum virus, poliovirus, rabies virus, JC virus and arboviral encephalitis virus.

Pathogenic bacteria causing infections treatable by methods of the disclosure include, but are not limited to, chlamydia, rickettsial bacteria, mycobacteria, staphylococci, streptococci, pneumococci, meningococci and conococci, Klebsiella, Proteus, Serratia, Pseudomonas, Legionella, diphtheria, Salmonella, bacilli, cholera, tetanus, botulism, anthrax, plague, leptospirosis, and Lyme's disease bacteria.

Pathogenic fungi causing infections treatable by methods of the disclosure include, but are not limited to, Candida (albicans, krusei, glabrata, tropicalis, etc.), Cryptococcus neoformans, Aspergillus (fumigatus, niger, etc.), Genus Mucorales (mucor, absidia, rhizophus), Sporothrix schenkii, Blastomyces dermatitidis, Paracoccidioides brasiliensis, Coccidioides immitis and Histoplasma capsulatum.

Pathogenic parasites causing infections treatable by methods of the disclosure include, but are not limited to, Entamoeba histolytica, Balantidium coli, Naegleriafowleri, Acanthamoeba sp., Giardia lambia, Cryptosporidium sp., Pneumocystis carinii, Plasmodium vivax, Babesia microti, Trypanosoma brucei, Trypanosoma cruzi, Leishmania donovani, Toxoplasma gondi, and Nippostrongylus brasiliensis.

The agents can be combined with the present compound in a single or continuous dosage form, or the agents can be administered simultaneously or sequentially as separate dosage forms.

Pharmaceutical Formulations and Dosage Forms

When employed as pharmaceuticals, the compounds of the disclosure can be administered in the form of pharmaceutical compositions. These compositions can be prepared in a manner well known in the pharmaceutical art, and can be administered by a variety of routes, depending upon whether local or systemic treatment is desired and upon the area to be treated. Administration may be topical (including transdermal, epidermal, ophthalmic and to mucous membranes including intranasal, vaginal and rectal delivery), pulmonary (e.g., by inhalation or insufflation of powders or aerosols, including by nebulizer; intratracheal or intranasal), oral, or parenteral. Parenteral administration includes intravenous, intraarterial, subcutaneous, intraperitoneal intramuscular or injection or infusion; or intracranial, e.g., intrathecal or intraventricular, administration. Parenteral administration can be in the form of a single bolus dose, or may be, for example, by a continuous perfusion pump. Pharmaceutical compositions and formulations for topical administration may include transdermal patches, ointments, lotions, creams, gels, drops, suppositories, sprays, liquids and powders. Conventional pharmaceutical carriers, aqueous, powder or oily bases, thickeners and the like may be necessary or desirable.

This disclosure also includes pharmaceutical compositions which contain, as the active ingredient, the compound of the disclosure or a pharmaceutically acceptable salt thereof, in combination with one or more pharmaceutically acceptable carriers (excipients). In some embodiments, the composition is suitable for topical administration. In making the compositions of the disclosure, the active ingredient is typically mixed with an excipient, diluted by an excipient or enclosed within such a carrier in the form of, for example, a capsule, sachet, paper, or other container. When the excipient serves as a diluent, it can be a solid, semi-solid, or liquid material, which acts as a vehicle, carrier or medium for the active ingredient. Thus, the compositions can be in the form of tablets, pills, powders, lozenges, sachets, cachets, elixirs, suspensions, emulsions, solutions, syrups, aerosols (as a solid or in a liquid medium), ointments containing, for example, up to 10% by weight of the active compound, soft and hard gelatin capsules, suppositories, sterile injectable solutions, and sterile packaged powders.

In preparing a formulation, the active compound can be milled to provide the appropriate particle size prior to combining with the other ingredients. If the active compound is substantially insoluble, it can be milled to a particle size of less than 200 mesh. If the active compound is substantially water soluble, the particle size can be adjusted by milling to provide a substantially uniform distribution in the formulation, e.g. about 40 mesh.

The compounds of the disclosure may be milled using known milling procedures such as wet milling to obtain a particle size appropriate for tablet formation and for other formulation types. Finely divided (nanoparticulate) preparations of the compounds of the disclosure can be prepared by processes known in the art, e.g., see International App. No. WO 2002/000196.

Some examples of suitable excipients include lactose, dextrose, sucrose, sorbitol, mannitol, starches, gum acacia, calcium phosphate, alginates, tragacanth, gelatin, calcium silicate, microcrystalline cellulose, polyvinylpyrrolidone, cellulose, water, syrup, and methyl cellulose. The formulations can additionally include: lubricating agents such as talc, magnesium stearate, and mineral oil; wetting agents; emulsifying and suspending agents; preserving agents such as methyl- and propylhydroxy-benzoates; sweetening agents; and flavoring agents. The compositions of the disclosure can be formulated so as to provide quick, sustained or delayed release of the active ingredient after administration to the patient by employing procedures known in the art.

The compositions can be formulated in a unit dosage form, each dosage containing from about 5 to about 1000 mg (1 g), more usually about 100 to about 500 mg, of the active ingredient. The term “unit dosage forms” refers to physically discrete units suitable as unitary dosages for human subjects and other mammals, each unit containing a predetermined quantity of active material calculated to produce the desired therapeutic effect, in association with a suitable pharmaceutical excipient.

In some embodiments, the compositions of the disclosure contain from about 5 to about 50 mg of the active ingredient. One having ordinary skill in the art will appreciate that this embodies compositions containing about 5 to about 10, about 10 to about 15, about 15 to about 20, about 20 to about 25, about 25 to about 30, about 30 to about 35, about 35 to about 40, about 40 to about 45, or about 45 to about 50 mg of the active ingredient.

In some embodiments, the compositions of the disclosure contain from about 50 to about 500 mg of the active ingredient. One having ordinary skill in the art will appreciate that this embodies compositions containing about 50 to about 100, about 100 to about 150, about 150 to about 200, about 200 to about 250, about 250 to about 300, about 350 to about 400, or about 450 to about 500 mg of the active ingredient.

In some embodiments, the compositions of the disclosure contain from about 500 to about 1000 mg of the active ingredient. One having ordinary skill in the art will appreciate that this embodies compositions containing about 500 to about 550, about 550 to about 600, about 600 to about 650, about 650 to about 700, about 700 to about 750, about 750 to about 800, about 800 to about 850, about 850 to about 900, about 900 to about 950, or about 950 to about 1000 mg of the active ingredient.

Similar dosages may be used of the compounds described herein in the methods and uses of the disclosure.

The active compound can be effective over a wide dosage range and is generally administered in a pharmaceutically effective amount. It will be understood, however, that the amount of the compound actually administered will usually be determined by a physician, according to the relevant circumstances, including the condition to be treated, the chosen route of administration, the actual compound administered, the age, weight, and response of the individual patient, the severity of the patient's symptoms, and the like.

For preparing solid compositions such as tablets, the principal active ingredient is mixed with a pharmaceutical excipient to form a solid preformulation composition containing a homogeneous mixture of a compound of the present disclosure. When referring to these preformulation compositions as homogeneous, the active ingredient is typically dispersed evenly throughout the composition so that the composition can be readily subdivided into equally effective unit dosage forms such as tablets, pills and capsules. This solid preformulation is then subdivided into unit dosage forms of the type described above containing from, for example, about 0.1 to about 1000 mg of the active ingredient of the present disclosure.

The tablets or pills of the present disclosure can be coated or otherwise compounded to provide a dosage form affording the advantage of prolonged action. For example, the tablet or pill can comprise an inner dosage and an outer dosage component, the latter being in the form of an envelope over the former. The two components can be separated by an enteric layer which serves to resist disintegration in the stomach and permit the inner component to pass intact into the duodenum or to be delayed in release. A variety of materials can be used for such enteric layers or coatings, such materials including a number of polymeric acids and mixtures of polymeric acids with such materials as shellac, cetyl alcohol, and cellulose acetate.

The liquid forms in which the compounds and compositions of the present disclosure can be incorporated for administration orally or by injection include aqueous solutions, suitably flavored syrups, aqueous or oil suspensions, and flavored emulsions with edible oils such as cottonseed oil, sesame oil, coconut oil, or peanut oil, as well as elixirs and similar pharmaceutical vehicles.

Compositions for inhalation or insufflation include solutions and suspensions in pharmaceutically acceptable, aqueous or organic solvents, or mixtures thereof, and powders. The liquid or solid compositions may contain suitable pharmaceutically acceptable excipients as described supra. In some embodiments, the compositions are administered by the oral or nasal respiratory route for local or systemic effect. Compositions can be nebulized by use of inert gases. Nebulized solutions may be breathed directly from the nebulizing device or the nebulizing device can be attached to a face mask, tent, or intermittent positive pressure breathing machine. Solution, suspension, or powder compositions can be administered orally or nasally from devices which deliver the formulation in an appropriate manner.

Topical formulations can contain one or more conventional carriers. In some embodiments, ointments can contain water and one or more hydrophobic carriers selected from, for example, liquid paraffin, polyoxyethylene alkyl ether, propylene glycol, white Vaseline, and the like. Carrier compositions of creams can be based on water in combination with glycerol and one or more other components, e.g. glycerinemonostearate, PEG-glycerinemonostearate and cetylstearyl alcohol. Gels can be formulated using isopropyl alcohol and water, suitably in combination with other components such as, for example, glycerol, hydroxyethyl cellulose, and the like. In some embodiments, topical formulations contain at least about 0.1, at least about 0.25, at least about 0.5, at least about 1, at least about 2, or at least about 5 wt % of the compound of the disclosure. The topical formulations can be suitably packaged in tubes of, for example, 100 g which are optionally associated with instructions for the treatment of the select indication, e.g., psoriasis or other skin condition.

The amount of compound or composition administered to a patient will vary depending upon what is being administered, the purpose of the administration, such as prophylaxis or therapy, the state of the patient, the manner of administration, and the like. In therapeutic applications, compositions can be administered to a patient already suffering from a disease in an amount sufficient to cure or at least partially arrest the symptoms of the disease and its complications. Effective doses will depend on the disease condition being treated as well as by the judgment of the attending clinician depending upon factors such as the severity of the disease, the age, weight and general condition of the patient, and the like.

The compositions administered to a patient can be in the form of pharmaceutical compositions described above. These compositions can be sterilized by conventional sterilization techniques, or may be sterile filtered. Aqueous solutions can be packaged for use as is, or lyophilized, the lyophilized preparation being combined with a sterile aqueous carrier prior to administration. The pH of the compound preparations typically will be between 3 and 11, more preferably from 5 to 9 and most preferably from 7 to 8. It will be understood that use of certain of the foregoing excipients, carriers, or stabilizers will result in the formation of pharmaceutical salts.

The therapeutic dosage of a compound of the present disclosure can vary according to, for example, the particular use for which the treatment is made, the manner of administration of the compound, the health and condition of the patient, and the judgment of the prescribing physician. The proportion or concentration of a compound of the disclosure in a pharmaceutical composition can vary depending upon a number of factors including dosage, chemical characteristics (e.g., hydrophobicity), and the route of administration. For example, the compounds of the disclosure can be provided in an aqueous physiological buffer solution containing about 0.1 to about 10% w/v of the compound for parenteral administration. Some typical dose ranges are from about 1 μg/kg to about 1 g/kg of body weight per day. In some embodiments, the dose range is from about 0.01 mg/kg to about 100 mg/kg of body weight per day. The dosage is likely to depend on such variables as the type and extent of progression of the disease or disorder, the overall health status of the particular patient, the relative biological efficacy of the compound selected, formulation of the excipient, and its route of administration. Effective doses can be extrapolated from dose-response curves derived from in vitro or animal model test systems.

The compositions of the disclosure can further include one or more additional pharmaceutical agents such as a chemotherapeutic, steroid, anti-inflammatory compound, or immunosuppressant, examples of which are listed herein.

Labeled Compounds and Assay Methods

Another aspect of the present disclosure relates to labeled compounds of the disclosure (radio-labeled, fluorescent-labeled, etc.) that would be useful not only in imaging techniques but also in assays, both in vitro and in vivo, for localizing and quantitating A2A and/or A2B receptors in tissue samples, including human, and for identifying A2A and/or A2B antagonists by inhibition binding of a labeled compound. Substitution of one or more of the atoms of the compounds of the present disclosure can also be useful in generating differentiated ADME (Adsorption, Distribution, Metabolism and Excretion.) Accordingly, the present disclosure includes adenosine receptor (e.g., A2A and/or A2B) assays that contain such labeled or substituted compounds.

The present disclosure further includes isotopically-labeled compounds of the disclosure. An “isotopically” or “radio-labeled” compound is a compound of the disclosure where one or more atoms are replaced or substituted by an atom having an atomic mass or mass number different from the atomic mass or mass number typically found in nature (i.e., naturally occurring). Suitable radionuclides that may be incorporated in compounds of the present disclosure include but are not limited to ²H (also written as D for deuterium), ³H (also written as T for tritium), ¹¹C, ¹³C, ¹⁴C, ¹³N, ¹⁵N, ¹⁵O, ¹⁷O, ¹⁸O, ¹⁸F, ³⁵S, ³⁶Cl, ⁸²Br, ⁷⁵Br, ⁷⁶Br, ⁷⁷Br, ¹²³I, ¹²⁴I, ¹²⁵I and ¹³¹I. For example, one or more hydrogen atoms in a compound of the present disclosure can be replaced by deuterium atoms (e.g., one or more hydrogen atoms of a C₁₋₆ alkyl group of Formula (I) can be optionally substituted with deuterium atoms, such as —CD₃ being substituted for —CH₃). In some embodiments, alkyl groups in Formula (I) can be perdeuterated.

One or more constituent atoms of the compounds presented herein can be replaced or substituted with isotopes of the atoms in natural or non-natural abundance. In some embodiments, the compound includes at least one deuterium atom. In some embodiments, the compound includes two or more deuterium atoms. In some embodiments, the compound includes 1-2, 1-3,1-4, 1-5, or 1-6 deuterium atoms. In some embodiments, all of the hydrogen atoms in a compound can be replaced or substituted by deuterium atoms.

In some embodiments, 1, 2, 3, 4, 5, 6, 7, or 8 hydrogen atoms, attached to carbon atoms of “alkyl”, “alkenyl”, “alkynyl”, “aryl”, “phenyl”, “cycloalkyl”, “heterocycloalkyl”, or “heteroaryl” substituents or “—C₁₋₆ alkyl-”, “alkylene”, “alkenylene” and “alkynylene” linking groups, as described herein, are optionally replaced by deuterium atoms.

Synthetic methods for including isotopes into organic compounds are known in the art (Deuterium Labeling in Organic Chemistry by Alan F. Thomas (New York, N.Y., Appleton-Century-Crofts, 1971; The Renaissance of H/D Exchange by Jens Atzrodt, Volker Derdau, Thorsten Fey and Jochen Zimmermann, Angew. Chem. Int. Ed. 2007, 7744-7765; The Organic Chemistry of Isotopic Labelling by James R. Hanson, Royal Society of Chemistry, 2011). Isotopically labeled compounds can be used in various studies such as NMR spectroscopy, metabolism experiments, and/or assays.

Substitution with heavier isotopes, such as deuterium, may afford certain therapeutic advantages resulting from greater metabolic stability, for example, increased in vivo half-life or reduced dosage requirements, and hence may be preferred in some circumstances. (see e.g., A. Kerekes et. al. J. Med. Chem. 2011, 54, 201-210; R. Xu et. al. J. Label Compd. Radiopharm. 2015, 58, 308-312). In particular, substitution at one or more metabolism sites may afford one or more of the therapeutic advantages.

The radionuclide that is incorporated in the instant radio-labeled compounds will depend on the specific application of that radio-labeled compound. For example, for in vitro adenosine receptor labeling and competition assays, compounds that incorporate ³H, ¹⁴C, ⁸²Br, ¹²⁵I, ¹³¹I Or ³⁵S can be useful. For radio-imaging applications ¹¹C, ¹⁸F, ¹²⁵I, ¹²³I, ¹²⁴I, ¹³¹I, ⁷⁵Br, ⁷⁶Br or ⁷⁷Br can be useful.

It is understood that a “radio-labeled” or “labeled compound” is a compound that has incorporated at least one radionuclide. In some embodiments, the radionuclide is selected from the group consisting of ³H, ¹⁴C, ¹²⁵I, ³⁵S and ⁸²Br.

The present disclosure can further include synthetic methods for incorporating radio-isotopes into compounds of the disclosure. Synthetic methods for incorporating radio-isotopes into organic compounds are well known in the art, and an ordinary skill in the art will readily recognize the methods applicable for the compounds of disclosure.

A labeled compound of the disclosure can be used in a screening assay to identify/evaluate compounds. For example, a newly synthesized or identified compound (i.e., test compound) which is labeled can be evaluated for its ability to bind an adenosine receptor by monitoring its concentration variation when contacting with the adenosine receptor, through tracking of the labeling. For example, a test compound (labeled) can be evaluated for its ability to reduce binding of another compound which is known to bind to a an adenosine receptor (i.e., standard compound). Accordingly, the ability of a test compound to compete with the standard compound for binding to the adenosine receptor directly correlates to its binding affinity. Conversely, in some other screening assays, the standard compound is labeled and test compounds are unlabeled. Accordingly, the concentration of the labeled standard compound is monitored in order to evaluate the competition between the standard compound and the test compound, and the relative binding affinity of the test compound is thus ascertained.

Kits

The present disclosure also includes pharmaceutical kits useful, for example, in the treatment or prevention of adenosine receptor-associated diseases or disorders (such as, e.g., cancer, an inflammatory disease, a cardiovascular disease, or a neurodegenerative disease) which include one or more containers containing a pharmaceutical composition comprising a therapeutically effective amount of a compound of the disclosure. Such kits can further include, if desired, one or more of various conventional pharmaceutical kit components, such as, for example, containers with one or more pharmaceutically acceptable carriers, additional containers, etc., as will be readily apparent to those skilled in the art. Instructions, either as inserts or as labels, indicating quantities of the components to be administered, guidelines for administration, and/or guidelines for mixing the components, can also be included in the kit.

The invention will be described in greater detail by way of specific examples. The following examples are offered for illustrative purposes, and are not intended to limit the invention in any manner. Those of skill in the art will readily recognize a variety of non-critical parameters which can be changed or modified to yield essentially the same results. The compounds of the Examples have been found to inhibit the activity of an adenosine receptor (e.g., A2A and/or A2B) according to at least one assay described herein.

EXAMPLES

Preparatory LC-MS purifications of some of the compounds prepared were performed on Waters mass directed fractionation systems. The basic equipment setup, protocols, and control software for the operation of these systems have been described in detail in the literature (see e.g. “Two-Pump At Column Dilution Configuration for Preparative LC-MS”, K. Blom, J. Combi. Chem., 4, 295 (2002); “Optimizing Preparative LC-MS Configurations and Methods for Parallel Synthesis Purification”, K. Blom, R. Sparks, J. Doughty, G. Everlof, T. Haque, A. Combs, J. Combi. Chem., 5, 670 (2003); and “Preparative LC-MS Purification: Improved Compound Specific Method Optimization”, K. Blom, B. Glass, R. Sparks, A. Combs, J. Combi. Chem., 6, 874-883 (2004)). The compounds separated were typically subjected to analytical liquid chromatography mass spectrometry (LCMS) for purity analysis under the following conditions: Instrument; Agilent 1100 series, LC/MSD, Column: Waters Sunfire™ C₁₈ 5 μm, 2.1×50 mm, Buffers: mobile phase A: 0.025% TFA in water and mobile phase B: acetonitrile; gradient 2% to 80% of B in 3 minutes with flow rate 2.0 mL/minute.

Some of the compounds prepared were also separated on a preparative scale by reverse-phase high performance liquid chromatography (RP-HPLC) with MS detector or flash chromatography (silica gel) as indicated in the Examples. Typical preparative reverse-phase high performance liquid chromatography (RP-HPLC) column conditions are as follows:

pH=2 purifications: Waters Sunfire™ C₁₈ 5 μm, 30×100 mm or Waters XBridge™ C₁₈ 5 μm, 30×100 mm column, eluting with mobile phase A: 0.1% TFA (trifluoroacetic acid) in water and mobile phase B: acetonitrile; the flow rate was 60 mL/minute, the separating gradient was optimized for each compound using the Compound Specific Method Optimization protocol as described in the literature (see e.g. “Preparative LCMS Purification: Improved Compound Specific Method Optimization”, K. Blom, B. Glass, R. Sparks, A. Combs, J. Comb. Chem., 6, 874-883 (2004)).

pH=10 purifications: Waters XBridge™ C₁₈ 5 μm, 30×100 mm column, eluting with mobile phase A: 0.1% NH₄OH in water and mobile phase B: acetonitrile; the flow rate was 60 mL/minute, the separating gradient was optimized for each compound using the Compound Specific Method Optimization protocol as described in the literature (see e.g. “Preparative LCMS Purification: Improved Compound Specific Method Optimization”, K. Blom, B. Glass, R. Sparks, A. Combs, J. Comb. Chem., 6, 874-883 (2004)).

Example 1. 3-(5-Amino-2-(hydroxy(phenyl)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile

Step 1: 3-(2-Amino-6-chloropyrimidin-4-yl)benzonitrile

A mixture of 4,6-dichloropyrimidin-2-amine (2.5 g, 15.24 mmol), (3-cyanophenyl)boronic acid (2.016 g, 13.72 mmol), tetrakis(triphenylphosphine)palladium(0) (1.057 g, 0.915 mmol) and sodium carbonate (3.23 g, 30.5 mmol) in 1,4-dioxane (60 mL), and water (5 mL) was degassed with nitrogen, then the resulting mixture was heated at 60° C. for two days. After cooled to room temperature (RT), the mixture was concentrated, then diluted with water, and extracted with dichloromethane (DCM, 3×30 mL). The combined organic layers were dried over MgSO₄, filtered, and concentrated. The residue was purified by flash chromatography on a silica gel column with 8% ethyl acetate (EtOAc) in dichloromethane to afford the desired product. LCMS calculated for C₁₁H₈ClN₄ (M+H)⁺: 231.0. Found: 231.0.

Step 2: 3-(5-Amino-2-(hydroxy(phenyl)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile

A solution of 3-(2-amino-6-chloropyrimidin-4-yl)benzonitrile (100 mg, 0.434 mmol) and 2-hydroxy-2-phenylacetohydrazide (108 mg, 0.650 mmol) in ethanol (2 ml) was heated and stirred at 95° C. for 3 h. After cooling to RT, the reaction mixture was concentrated to dryness, taken into N,O-bis(trimethylsilyl)acetamide (1 mL) and stirred at 120° C. for 7 h. The resulting mixture was cooled to RT, poured onto ice, and stirred for 1 h. The resulting suspension was extracted with DCM three times. The combined organic layers were dried over MgSO₄, filtered, and concentrated. The residue was dissolved in methanol (MeOH) and purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to afford the product as TFA salt. LCMS calculated for C₁₉H₁₅N₆O (M+H)⁺: 343.1; found 343.1.

Example 2. 3-(5-Amino-2-benzyl-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile

The title compound was prepared using similar procedures as described for Example 1, with 2-phenylacetohydrazide replacing 2-hydroxy-2-phenylacetohydrazide in Step 2. The resulting residue was purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to afford the product as TFA salt. LCMS calculated for C₁₉H₁₅N₆(M+H)⁺: 327.1; found 327.1.

Example 3. 3-(5-Amino-2-(pyridin-2-ylmethyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile

The title compound was prepared using similar procedures as described for Example 1, with 2-(pyridin-2-yl)acetohydrazide replacing 2-hydroxy-2-phenylacetohydrazide in Step 2. The resulting residue was purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to afford the product as TFA salt. LCMS calculated for C₁₈H₁₄N₇(M+H)⁺: 328.1; found 328.1.

Example 4. 3-(5-Amino-2-(cyclohexylmethyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile

The title compound was prepared using similar procedures as described for Example 1, with 2-cyclohexylacetohydrazide replacing 2-hydroxy-2-phenylacetohydrazide in Step 2. The resulting residue was purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to afford the product as TFA salt. LCMS calculated for C₁₉H₂₁N₆(M+H)⁺: 333.2; found 333.2.

Example 5. 3-(5-Amino-2-(3-(1-methyl-1H-pyrazol-4-yl)benzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile

Step 1: 3-(5-Amino-2-(3-bromobenzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile

The title compound was prepared using similar procedures as described for Example 1, with 2-(3-bromophenyl)acetohydrazide replacing 2-hydroxy-2-phenylacetohydrazide in Step 2. The resulting residue was purified by column chromatography (0% to 80% EtOAc in Hexanes) to afford the desired product. LCMS calculated for C₁₉H₁₄BrN₆ (M+H)⁺: 405.0; found 405.2.

Step 2: 3-(5-Amino-2-(3-(1-methyl-1H-pyrazol-4-yl)benzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile

A mixture of 3-(5-amino-2-(3-bromobenzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile (10 mg, 0.025 mmol), (1-methyl-1H-pyrazol-4-yl)boronic acid (6.21 mg, 0.049 mmol), chloro(2-dicyclohexylphosphino-2′,4′,6′-triisopropyl-1,1′-biphenyl)[2-(2′-amino-1,1′-biphenyl)]palladium(II) (1.942 mg, 2.468 μmol), and sodium carbonate (2.62 mg, 0.025 mmol) in 1,4-dioxane (224 μL) and water (22.43 μL) was purged with N₂ and then stirred at 100° C. for 1 h.

The resulting mixture was cooled to RT, concentrated, and purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to afford the product as TFA salt. LCMS calculated for C₂₃H₁₉N₈ (M+H)⁺: 407.2; found 407.1.

Example 6. 3-(5-Amino-2-((2-oxopyrrolidin-1-yl)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile

The title compound was prepared using similar procedures as described for Example 1, with 2-(2-oxopyrrolidin-1-yl)acetohydrazide replacing 2-hydroxy-2-phenylacetohydrazide in Step 2. The resulting residue was purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to afford the product as TFA salt. LCMS calculated for C₁₇H₁₆N₇O (M+H)⁺: 334.1; found 334.2.

Example 7. 3-(5-Amino-2-((1-methyl-1H-imidazol-2-yl)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile

Step 1: 2-(1-Methyl-H-imidazol-2-yl)acetohydrazide

Hydrazine (18.66 μL, 0.595 mmol) was added to an ethanol (991 μL) solution of ethyl 2-(1-methyl-1H-imidazol-2-yl)acetate (50 mg, 0.297 mmol) at RT. The reaction mixture was stirred at 100° C. for 2 h, cooled to RT, concentrated, and used in next step without further purification. LC-MS calculated for C₆H₁₁N₄O (M+H)⁺: 155.1; found 155.1.

Step 2: 3-(5-Amino-2-((1-methyl-1H-imidazol-2-yl)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile

The title compound was prepared using similar procedures as described for Example 1, with 2-(1-methyl-1H-imidazol-2-yl)acetohydrazide replacing 2-hydroxy-2-phenylacetohydrazide in Step 2. The resulting residue was purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to afford the product as TFA salt. LC-MS calculated for C₁₇H₁₅N₈(M+H)⁺: 331.1; found 331.1.

Example 8. 3-(5-Amino-2-(amino(phenyl)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile

Step 1: 3-(5-Amino-2-(chloro(phenyl)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile

Thionyl chloride (107 μl, 1.460 mmol) was added to 3-(5-amino-2-(hydroxy(phenyl)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile (from Example 1) (10 mg, 0.029 mmol) at RT. After stirring for 30 min, the reaction mixture was concentrated to dryness to afford the desired product, which was used in next step without further purification. LC-MS calculated for C₁₉H₁₄ClN₆ (M+H)⁺: 361.1; found 361.1.

Step 2: 3-(5-Amino-2-(amino(phenyl)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile

NH₄OH solution was added to a DMF (139 μL) solution of 3-(5-amino-2-(chloro(phenyl)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile (5 mg, 0.014 mmol), and the mixture was heated and stirred at 80° C. overnight. The resulting mixture was then cooled to RT, and purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to afford the product as TFA salt. LC-MS calculated for C₁₉H₁₆N₇(M+H)⁺: 342.1; found 342.1.

Example 9. 3-(5-Amino-2-benzyl-8-(hydroxymethyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile

Step 1: 3-(5-Amino-2-benzyl-8-bromo-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile

NBS (10.87 mg, 0.061 mmol) was added to a DCM (305 μL) solution of 3-(5-amino-2-benzyl-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile (from Example 2) (20 mg, 0.061 mmol) at 0° C. After stirring for 30 min at 0° C., the mixture was quenched with saturated NaHCO₃ solution and extracted with DCM (×3). The combined organic layers were dried over MgSO₄ and concentrated. The resulting residue was purified by column chromatography (0 to 50% EtOAc in DCM) to afford desired product. LC-MS calculated for C₁₉H₁₄BrN₆ (M+H)⁺: 405.0; found 405.1.

Step 2: 3-(5-Amino-2-benzyl-8-vinyl-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile

A mixture of 3-(5-amino-2-benzyl-8-bromo-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile (50 mg, 0.123 mmol), 4,4,5,5-tetramethyl-2-vinyl-1,3,2-dioxaborolane (38.0 mg, 0.247 mmol), chloro(2-dicyclohexylphosphino-2′,4′,6′-triisopropyl-1,1′-biphenyl)[2-(2′-amino-1,1′-biphenyl)]palladium(II) (9.71 mg, 0.012 mmol), and sodium carbonate (13.08 mg, 0.123 mmol) in 1,4-dioxane (1122 μL) and water (112 μL) was purged with N₂ and stirred at 100° C. for 1 h. The reaction mixture was then cooled to RT, concentrated, and extracted with EtOAc (×3). The combined organic layers were dried over MgSO₄, concentrated, and purified by column chromatography (0 to 50% EtOAc in DCM). LC-MS calculated for C₂₁H₁₇N₆(M+H)⁺: 353.2; found 353.2.

Step 3: 3-(5-Amino-2-benzyl-8-formyl-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile

Osmium tetroxide in water (4% w/w, 78 μL, 10.00 μmol) was added to a 1,4-dioxane (1000 μL) solution of 3-(5-amino-2-benzyl-8-vinyl-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile (35 mg, 0.100 mmol) and sodium periodate (42.8 mg, 0.200 mmol) at RT. After stirring for 1 h, the mixture was diluted with water and extracted with EtOAc (×3). The combined organic layers were dried over MgSO₄, concentrated, and used in the next step without further purification. LC-MS calculated for C₂₀H₁₅N₆O (M+H)⁺: 355.1; found 355.2.

Step 4: 3-(5-Amino-2-benzyl-8-(hydroxymethyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile

Sodium borohydride (1.06 mg, 0.028 mmol) was added to a DCM (141 μL) solution of 3-(5-amino-2-benzyl-8-formyl-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile (5 mg, 0.014 mmol) at 0° C. After stirring for 10 min, the resulting mixture was diluted with MeOH and purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to afford the product as TFA salt. LC-MS calculated for C₂₀H₁₇N₆O (M+H)⁺: 357.1; found 357.1.

Example 10. 3-(5-Amino-2-(phenylamino)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile

Step 1: 6-Chloro-N²,N²-bis 4-methoxybenzyl)pyrimidine-2,4-diamine

To a solution of 2,6-dichloropyrimidin-4-amine (1 g, 6.10 mmol) in 2-propanol (6.10 mL) was added N,N-diisopropylethylamine (1.278 ml, 7.32 mmol) and bis(4-methoxybenzyl)amine (1.569 g, 6.10 mmol). The resulting solution was stirred at 100° C. for 16 h, cooled to RT, diluted with water (100 mL), and extracted with ethyl acetate (100 mL). The organic extract was washed with water (100 mL) and brine (100 mL), dried over anhydrous sodium sulfate, filtered, and concentrated to yield the crude product, which was used in the next step without further purification. LC-MS calculated for C₂₀H₂₂ClN₄O₂(M+H)⁺: 385.1; found 385.1.

Step 2: 7-Chloro-N,N-bis(4-methoxybenzyl)-[1,2,4]triazolo[1,5-c]pyrimidine-2,5-diamine

O-ethyl carbonisothiocyanatidate (1.018 mL, 9.00 mmol) was added to a 1,4-dioxane (12.00 mL) solution of 6-chloro-N²,N²-bis(4-methoxybenzyl)pyrimidine-2,4-diamine (2.309 g, 6 mmol) at RT. The reaction mixture was then stirred at 90° C. overnight. The reaction mixture was cooled to RT, concentrated, and the crude material was dissolved in methanol (21.46 mL) and ethanol (21.48 mL), and N,N-diisopropylethylamine (2.090 mL, 12.00 mmol) was added, followed by hydroxylamine hydrochoride (1.251 g, 18.00 mmol). The reaction mixture was stirred at 45° C. for 2 h, cooled to RT, and concentrated. The resulting material was taken into EtOAc and washed with water. The organic layer was dried over anhydrous sodium sulfate, filtered, and concentrated to yield the crude product, which was purified by silica gel chromatography eluting with 0% to 50% EtOAc in Hexanes. LC-MS calculated for C₂₁H₂₂ClN₆O₂ (M+H)⁺: 425.1; found 425.2.

Step 3: 3-(2-Amino-5-(bis(4-methoxybenzyl)amino)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile

Chloro(2-dicyclohexylphosphino-2′,4′,6′-tri-i-propyl-1,1′-biphenyl)(2′-amino-1,1′-biphenyl-2-yl) palladium(II) (55.6 mg, 0.071 mmol) was added to a mixture of (3-cyanophenyl)boronic acid (156 mg, 1.059 mmol), 7-chloro-N⁵,N⁵-bis(4-methoxybenzyl)-[1,2,4]triazolo[1,5-c]pyrimidine-2,5-diamine (300 mg, 0.706 mmol), and sodium carbonate (150 mg, 1.412 mmol) in 1,4-dioxane (1961 μL) and water (392 μL). The mixture was purged with N₂ and stirred at 95° C. overnight. The reaction mixture was then cooled to RT, concentrated, and purified by silica gel chromatography eluting with 0% to 50% EtOAc in DCM. LC-MS calculated for C₂₈H₂₆N₇O₂ (M+H)⁺: 492.2; found 492.2.

Step 4: 3-(5-Amino-2-(phenylamino)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile

A mixture of 3-(2-amino-5-(bis(4-methoxybenzyl)amino)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile (10 mg, 0.020 mmol), iodobenzene (4.15 mg, 0.020 mmol), chloro(2-dicyclohexylphosphino-2′,4′,6′-triisopropyl-1,1′-biphenyl)[2-(2′-amino-1,1′-biphenyl)]palladium(II) (1.601 mg, 2.034 μmol), and sodium tert-butoxide (3.91 mg, 0.041 mmol) in 1,4-dioxane (203 μL) was stirred at 100° C. for 1 h. The reaction mixture was cooled to RT, concentrated, treated with 0.5 mL of TFA, and stirred at 60° C. for 30 min. The reaction mixture was then concentrated and purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to afford the product as TFA salt. LC-MS calculated for C₁₈H₁₄N₇(M+H)⁺: 328.1; found 328.2.

Example 11. 3-(5-Amino-2-benzylimidazo[1,2-c]pyrimidin-7-yl)benzonitrile

Step 1: Ethyl 5-amino-7-chloroimidazo[1,2-c]pyrimidine-2-carboxylate

A solution of 6-chloropyrimidine-2,4-diamine (2 g, 13.83 mmol) and ethyl 3-bromo-2-oxopropanoate (2.60 ml, 20.75 mmol) in DME (50 ml) was stirred at 70° C. overnight. After completion, the reaction was cooled to room temperature and the resulting solid was collected by filtration. The crude solid was dissolved in hot methanol (25 mL) and the desired product was recrystallized by slowly cooling the solution to room temperature. The product was collected by filtration, washed with EtOAc, and dried to give the desired product. LC-MS calculated for C₉H₁₀ClN₄O₂(M+H)⁺: m/z=241.0; found 241.1.

Step 2: (5-Amino-7-chloroimidazo[1,2-c]pyrimidin-2-yl)methanol

To a stirred solution of ethyl 5-amino-7-chloroimidazo[1,2-c]pyrimidine-2-carboxylate (2.0 g, 8.3 mmol) in THF (200 mL) was added LAH (12.5 mL, 1 M in THF, 12.5 mmol) at 0° C. After stirring for 3 h, the reaction mixture was carefully quenched with water (0.3 mL)/1N NaOH (0.3 mL)/water (0.9 mL) at 0° C., filtered and rinsed with EtOAc/MeOH (9/1). The filtrate was dried over Na₂SO₄, and concentrated under reduced pressure. Light yellow solid precipitated from the solution, which was collected by filtration to obtain the desired product (0.85 g, 4.3 mmol). LC-MS calculated for C₇H₈ClN₄O (M+H)⁺: m/z=199.0; found 199.1.

Step 3: 3-(5-Amino-2-(hydroxymethyl)imidazo[1,2-c]pyrimidin-7-yl)benzonitrile

A mixture of (5-amino-7-chloroimidazo[1,2-c]pyrimidin-2-yl)methanol (0.85 g, 4.3 mmol), (3-cyanophenyl)boronic acid (0.94 g, 6.4 mmol), XPhos Pd G2 (0.168 g, 0.214 mmol) and sodium carbonate (1.36 g, 12.8 mmol) in 1,4-dioxane (100 mL) and water (10 mL) was purged with nitrogen and then stirred at 100° C. for 1 h. After being cooled to room temperature, the reaction mixture was washed with brine, dried over Na₂SO₄, filtered and concentrated under reduced pressure. Light yellow solid precipitated from the solution, which was collected by filtration to obtain the desired product (1.1 g, 4.1 mmol). LC-MS calculated for C₁₄H₁₂N₅O (M+H)⁺: m/z=266.1; found 266.1.

Step 4: 3-(5-Amino-2-(bromomethyl)imidazo[1,2-c]pyrimidin-7-yl)benzonitrile

To a stirred solution of 3-(5-amino-2-(hydroxymethyl)imidazo[1,2-c]pyrimidin-7-yl)benzonitrile (0.10 g, 0.38 mmol) in THF (10 mL) was added PBr₃ (71 μL, 0.75 mmol) at RT. After 3 h, the reaction mixture was carefully quenched with water at 0° C. The resulting light brown solid was collected by filtration, washed with Et₂O and dried under vacuum to give the desired product (82 mg, 0.25 mmol). LC-MS calculated for C₁₄H₁₁BrN₅ (M+H)⁺: m/z=328.0; found 328.0.

Step 5: 3-(5-Amino-2-benzylimidazo[1,2-c]pyrimidin-7-yl)benzonitrile

A mixture of 3-(5-amino-2-(bromomethyl)imidazo[1,2-c]pyrimidin-7-yl)benzonitrile (10 mg, 30 μmol), phenylboronic acid (7.4 mg, 61 μmol), tetrakis(triphenylphosphine)palladium(0) (3.5 mg, 3.1 μmol) and cesium carbonate (30 mg, 91 μmol) in 1,4-dioxane (2 mL) and water (0.2 mL) was purged with nitrogen and then stirred at 100° C. for 1 h. The resulting mixture was diluted with MeOH (3 mL) and filtered. The crude material was purified by prep-LCMS (pH=2, MeCN/water with TFA) to give the desired product as the TFA salt. LC-MS calculated for C₂₀H₁₆N₅(M+H)⁺: m/z=326.1; found 326.2.

Example 12. 5-Amino-7-(3-cyanophenyl)-N-ethyl-[1,2,4]triazolo[1,5-c]pyrimidine-2-carboxamide

Step 1: Ethyl 5-amino-7-(3-cyanophenyl)-[1,2,4]triazolo[1,5-c]pyrimidine-2-carboxylate

This compound was prepared using similar procedures as described for Example 1, with ethyl 2-hydrazinyl-2-oxoacetate replacing 2-hydroxy-2-phenylacetohydrazide in Step 2. It was purified by silica gel chromatography eluting with 0% to 50% EtOAc in DCM. LC-MS calculated for C₁₅H₁₃N₆O₂ (M+H)⁺: 309.1; found 309.1.

Step 2: 5-Amino-7-(3-cyanophenyl)-N-ethyl-[1,2,4]triazolo[1,5-c]pyrimidine-2-carboxamide

1 N NaOH aqueous solution (0.2 mL) was added to a THF (1 mL) solution of ethyl 5-amino-7-(3-cyanophenyl)-[1,2,4]triazolo[1,5-c]pyrimidine-2-carboxylate (0.062 g, 0.2 mmol), and the reaction mixture was stirred at 40° C. for 1 h. 1 N HCl aqueous solution was then added to adjust pH to 4, and the resulting mixture was extracted with DCM/iPrOH (×5). The combined organic layers were dried over sodium sulfate, filtered and concentrated to afford the desired carboxylic acid intermediate.

The above carboxylic acid intermediate was dissolved in DMF (2.0 mL), followed by the addition of 2 M ethanamine in THF (0.10 mL), BOP (0.177 g, 0.400 mmol), and N,N-diisopropylethylamine (0.035 mL, 0.20 mmol). After stirring at RT for 1 h, the mixture was concentrated and purified by prep-LCMS (pH=2, MeCN/water with TFA) to give the desired product as TFA salt. LC-MS calculated for C₁₅H₁₄N₇O (M+H)⁺: m/z=308.1; found 308.2.

Example 13. 3-(5-Amino-2-((2,6-difluorophenyl)(hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-methylbenzonitrile

Step 1: Methyl 2-(2,6-difluorophenyl)-2-hydroxyacetate

Concentrated sulfuric acid (1.4 mL, 27 mmol) was added to a methanol (45 mL) solution of 2,6-difluoromandelic acid (5.0 g, 27 mmol) at 0° C. The mixture was stirred at r.t. for 4 h before being concentrated. To the resulting slurry was added saturated NaHCO₃ solution. The resulting mixture was extracted with DCM. The combined organic layers were washed with water, dried over MgSO₄, filtered, and concentrated to afford the crude product, which was used in the next step without further purification. LC-MS calculated for C₁₁H₁₂F₂NO₃ (M+H+MeCN)⁺: m/z=244.1; found 244.2.

Step 2: 3-(5-Amino-2-((2,6-difluorophenyl) (hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-methylbenzonitrile

The title compound was prepared using similar procedures as described for Example 7, with methyl 2-(2,6-difluorophenyl)-2-hydroxyacetate replacing ethyl 2-(1-methyl-1H-imidazol-2-yl)acetate in Step 1. The resulting residue was purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to give the desired product as a TFA salt. LC-MS calculated for C₂₀H₁₅F₂N₆O (M+H)⁺: 393.1; found 393.1.

Example 14. 3-(5-Amino-2-((2,6-difluorophenyl)(hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile

Step 1: 3-(2-Amino-6-chloropyrimidin-4-yl)-2-fluorobenzonitrile

To a solution of 3-bromo-2-fluorobenzonitrile (18.3 g, 91 mmol) in THF (60 mL) cooled to 0° C. was added i-PrMgCl LiCl complex (70.4 mL, 91 mmol) in THF (1.3 M) over 20 min. The mixture was stirred at 0° C. for 50 min, then zinc chloride (48.1 mL, 91 mmol) in 2-MeTHF (1.9 M) was added at 0° C. The reaction was stirred at r.t. for 25 min, at which point 4,6-dichloropyrimidin-2-amine (10 g, 61.0 mmol) was added in one portion. The solution was stirred for 10 min. Tetrakis(triphenylphosphine)palladium (1.41 g, 1.22 mmol) was added to the mixture and the reaction was stirred at r.t. for 16 h. Upon completion, 2,4,6-trimercaptotriazine silica gel (2 g) was added to the reaction solution. The mixture was stirred for 1 h and filtered. The solid was washed with ethyl acetate until the desired product had eluted completely (as detected by LCMS). The filtrate was washed with saturated ammonium chloride solution and water. The organics were concentrated to afford the crude product. Water was added to the crude material and the resulting precipitate was collected by filtration and dried under a stream of nitrogen. The crude material was taken forward without additional purification. LC-MS calculated for Cl₁H7ClFN₄ (M+H)⁺: m/z=249.0; found 249.0.

Step 2: 3-(5-Amino-2-((2,6-difluorophenyl) (hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile

The title compound was prepared using similar procedures as described for Example 13, with 3-(2-amino-6-chloropyrimidin-4-yl)-2-fluorobenzonitrile replacing 3-(2-amino-6-chloropyrimidin-4-yl)-2-methylbenzonitrile in Step 2. The two enantiomers were separated by chiral SFC using a Phenomenex (R,R)-Whelk-O1 column (21.2×250 mm, 5 m particle size) eluting with an isocratic mobile phase 15% MeOH in CO₂ with a flow rate of 85 mL/minute. The retention times of peak one and peak two were 3.8 min and 5.3 min, respectively. Following concentration, peak two was purified by prep-LCMS (pH=2, MeCN/water with TFA) to give the desired product as a TFA salt. LC-MS calculated for C₁₉H2F₃N₆O (M+H)⁺: 397.1; found 397.1.

Example 15. 5-Amino-7-(3-cyano-2-fluorophenyl)-2-((2,6-difluorophenyl)(hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidine-8-carbonitrile

Step 1: 3-(5-Amino-8-bromo-2-((2,6-difluorophenyl) (hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile

This compound was prepared using similar procedures as described for Example 9, Step 1, with 3-(5-amino-2-((2,6-difluorophenyl)(hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile (from Example 14) replacing 3-(5-amino-2-benzyl-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile. LCMS calculated for C₁₉H₁₁BrF₃N₆O (M+H)⁺: 475.0; found 475.0.

Step 2: 5-Amino-7-(3-cyano-2-fluorophenyl)-2-((2,6-difluorophenyl) (hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidine-8-carbonitrile

A mixture of 3-(5-amino-8-bromo-2-((2,6-difluorophenyl)(hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile (0.12 g, 0.25 mmol), ZnCN₂ (0.060 g, 0.51 mmol) and tBuXPhos Pd G3 (0.020 g, 0.025 mmol) in 1,4-dioxane (0.63 mL) and water (0.63 mL) was purged with N₂ and was stirred at 100° C. for 1 h. After cooling to r.t., the reaction was diluted with saturated NaHCO₃ and the organics were extracted with EtOAc (3×). The combined organics were dried over MgSO₄ and concentrated. The two enantiomers were separated by chiral HPLC using a Phenomenex Lux Celluose-4 column (21.2×250 mm, 5 μm particle size) eluting with an isocratic mobile phase 60% EtOH in hexanes with a flow rate of 20 mL/minute. The retention times of peak one and peak two were 4.9 min and 7.2 min, respectively. Following concentration, peak one was purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to give the desired product as a TFA salt. LC-MS calculated for C₂₀H₁₁F₃N₇O (M+H)⁺: 422.1; found 422.1.

Example 16. 3-(5-Amino-2-((2-fluoro-6-(((1-methyl-2-oxopyrrolidin-3-yl)amino)methyl)phenyl)(hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile

Step 1: Methyl 2-(2-fluoro-6-vinylphenyl)acetate

This compound was prepared using similar procedures as described for Example 9, Step 2, with methyl 2-(2-bromo-6-fluorophenyl)acetate replacing 3-(5-amino-2-benzyl-8-bromo-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile. LCMS calculated for C₁₁H₁₂FO₂ (M+H)⁺: 195.1; found 195.1.

Step 2: Methyl 2-(2-fluoro-6-vinylphenyl)-2-hydroxyacetate

Methyl 2-(2-fluoro-6-vinylphenyl)acetate (2.5 g, 12.9 mmol) was dissolved in THF (130 mL) and cooled to −78° C. LDA (16.7 mL, 16.7 mmol) in THF (1.0 M) was added dropwise, and the resulting solution was stirred at −78° C. for 30 min. Then, 9,9-dimethyltetrahydro-4H-4a,7-methanobenzo[c][1,2]oxazireno[2,3-b]isothiazole 3,3-dioxide (4.7 g, 20.6 mmol) was added dropwise in THF (0.5 M). After 30 min at −78° C., the reaction mixture was warmed to 0° C. and stirred for 1 h. The reaction was quenched with saturated NH₄Cl. The aqueous layer was extracted with DCM (3×). The combined organics were dried over anhydrous Na₂SO₄, filtered, and concentrated under reduced pressure. The crude product was purified by column chromatography eluting with 0 to 50% ethyl acetate in hexanes to afford the desired product. LCMS calculated for C₁₁H₁₁FO₃Na (M+Na)⁺: 233.1; found 233.1.

Step 3: 2-(2-Fluoro-6-vinylphenyl)-2-hydroxyacetohydrazide

This compound was prepared using similar procedures as described for Example 7, Step 1, with methyl 2-(2-fluoro-6-vinylphenyl)-2-hydroxyacetate replacing ethyl 2-(1-methyl-1H-imidazol-2-yl)acetate. LCMS calculated for C₁₀H₁₂FN₂O₂(M+H)⁺: 211.1; found 211.1.

Step 4: 3-(5-Amino-2-((2-fluoro-6-vinylphenyl) (hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile

This compound was prepared using similar procedures as described for Example 14, Step 2, with 2-(2-fluoro-6-vinylphenyl)-2-hydroxyacetohydrazide replacing 2-(2,6-difluorophenyl)-2-hydroxyacetohydrazide. LCMS calculated for C₂₁H₁₅F₂N₆O (M+H)⁺: 405.1; found 405.1.

Step 5: 3-(5-Amino-2-((2-fluoro-6-formylphenyl) (hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile

This compound was prepared using a similar procedure as described for Example 9, Step 3, with 3-(5-amino-2-((2-fluoro-6-vinylphenyl)(hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile replacing 3-(5-amino-2-benzyl-8-vinyl-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile. LCMS calculated for C₂₀H₁₃F₂N₆O₂(M+H)⁺: 407.1; found 407.1.

Step 6: 3-(5-Amino-2-((2-fluoro-6-(((1-methyl-2-oxopyrrolidin-3-yl)amino)methyl)phenyl)(hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile

A solution of 3-amino-1-methylpyrrolidin-2-one (63 mg, 0.55 mmol) and 3-(5-amino-2-((2-fluoro-6-formylphenyl)(hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile (150 mg, 0.37 mmol) was stirred at 40° C. for 2 h in 1,2-dichloroethane (1.9 mL). Then sodium triacetoxyborohydride (160 mg, 0.74 mmol) was added and the reaction mixture was stirred at room temperature for 16 h. The reaction was diluted with saturated NaHCO₃ and the organics were extracted with EtOAc (3×). The combined organics were dried over MgSO₄ and concentrated. The diastereomers were separated by chiral HPLC using a Phenomenex Lux Celluose-4 column (21.2×250 mm, 5 μm particle size) eluting with an isocratic mobile phase 45% EtOH in hexanes with a flow rate of 20 mL/minute. The retention times of peak one and peak two were 14.9 min and 17.5 min, respectively. Following concentration, peak two was further separated by chiral HPLC using a Phenomenex Lux Celluose-1 column (21.2×250 mm, 5 μm particle size) eluting with an isocratic mobile phase 30% EtOH in hexanes with a flow rate of 20 mL/minute. The retention times of peak one and peak two were 11.0 min and 15.5 min, respectively. Following concentration, peak one was purified by preparative LC-MS (pH=2, MeCN/water with TFA) to give the desired product as a TFA salt. LC-MS calculated for C₂₅H₂₃F₂N₈O₂(M+H)⁺: 505.2; found 505.2.

Example 17. 3-(5-Amino-2-((2-fluoro-6-((6-methyl-5-oxo-2,6-diazaspiro[3.4]octan-2-yl)methyl)phenyl)(hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile

The title compound was prepared using similar procedures as described for Example 16, with 6-methyl-2,6-diazaspiro[3.4]octan-5-one replacing 3-amino-1-methylpyrrolidin-2-one in Step 6. The resulting residue was purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to afford the product as TFA salt. LCMS calculated for C₂₇H₂₅ F₂N₈O₂ (M+H)⁺: 531.2; found 531.2.

Example 18. 3-(5-Amino-2-((2-((ethyl((S)-2-oxopyrrolidin-3-yl)amino)methyl)-6-fluorophenyl)(hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile

Step 1: 3-(5-Amino-2-((2-fluoro-6-((((S)-2-oxopyrrolidin-3-yl)amino)methyl)phenyl) (hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile

This compound was prepared using similar procedures described for Example 16, with (S)-3-aminopyrrolidin-2-one replacing 3-amino-1-methylpyrrolidin-2-one in Step 6. LCMS calculated for C₂₄H₂₁F₂N₈O₂ (M+H)⁺: 491.2; found 491.2.

Step 2: 3-(5-Amino-2-((2-((ethyl((S)-2-oxopyrrolidin-3-yl)amino)methyl)-6-fluorophenyl) (hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile

A solution of acetaldehyde (2.5 μL, 0.044 mmol), 3-(5-amino-2-((2-fluoro-6-((((S)-2-oxopyrrolidin-3-yl)amino)methyl)phenyl)(hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile (20 mg, 0.040 mmol) and diisopropylethylamine (13 μL, 0.076 mmol) was stirred at r.t. for 8 h in DCM (0.10 mL) and methanol (0.10 mL). Then sodium cyanoborohydride (5.0 mg, 0.080 mmol) was added and the reaction mixture was stirred at r.t. for 16 h. The reaction was diluted with saturated NaHCO₃ and the organics were extracted with EtOAc (3×). The combined organics were dried over MgSO₄ and concentrated. The resulting residue was purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to afford the product as TFA salt. LCMS calculated for C₂₆H₂₅F₂N₈O₂ (M+H)⁺: 519.2; found 519.2.

Example 19. 2-(3-((2-((5-Amino-7-(3-cyano-2-fluorophenyl)-[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)methyl)-3-fluorobenzyl)amino)-2-oxopyrrolidin-1-yl)acetic acid

Step 1: 3-(5-Amino-2-(2-fluoro-6-formylbenzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile

This compound was prepared using similar procedures described for Example 16, Step 4 to Step 5, with 2-(2-fluoro-6-vinylphenyl)acetohydrazide replacing 2-(2-fluoro-6-vinylphenyl)-2-hydroxyacetohydrazide in Step 4. LCMS calculated for C₂₀H₁₃F₂N₆O (M+H)⁺: 391.1; found 391.1.

Step 2: 2-(3-((2-((5-Amino-7-(3-cyano-2-fluorophenyl)-[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)methyl)-3-fluorobenzyl)amino)-2-oxopyrrolidin-1-yl)acetic acid

A mixture of 2-(3-amino-2-oxopyrrolidin-1-yl)acetic acid (6.0 mg, 0.038 mmol), 3-(5-amino-2-(2-fluoro-6-formylbenzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile (10 mg, 0.026 mmol) and diisopropylethylamine (6.7 μL, 0.038 mmol) was stirred at 40° C. for 2 h in 1,2-dichloroethane (0.10 mL) and methanol (0.10 mL). Then sodium cyanoborohydride (1.6 mg, 0.026 mmol) was added and the reaction mixture was stirred at r.t. for 16 h. The reaction was diluted with saturated NaHCO₃ and the organics were extracted with EtOAc (3×). The combined organics were dried over MgSO₄ and concentrated. The resulting residue was purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to afford the product as TFA salt. LCMS calculated for C₂₆H₂₃F₂N₈O₃(M+H)⁺: 533.2; found 533.2.

Example 20. (R)-3-(5-Amino-2-(2-fluoro-6-(((2-oxotetrahydrofuran-3-yl)amino)methyl)benzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile

The title compound was prepared using similar procedures as described for Example 19, with (R)-3-aminodihydrofuran-2(3H)-one replacing 2-(3-amino-2-oxopyrrolidin-1-yl)acetic acid in Step 2. The resulting residue was purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to afford the product as TFA salt. LCMS calculated for C₂₄H₂₀F₂N₇O₂(M+H)⁺: 476.2; found 476.2.

Example 21. (R)-3-(5-Amino-2-(2-fluoro-6-(((2-oxopyrrolidin-3-yl)amino)methyl)benzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile

The title compound was prepared using similar procedures as described for Example 19, with (R)-3-aminopyrrolidin-2-one replacing 2-(3-amino-2-oxopyrrolidin-1-yl)acetic acid in Step 2. The resulting residue was purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to afford the product as TFA salt. LCMS calculated for C₂₄H₂₁F₂N₈O (M+H)⁺: 475.2; found 475.2.

Example 22. (S)-3-(5-Amino-2-(2-fluoro-6-(((2-oxopyrrolidin-3-yl)amino)methyl)benzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile

The title compound was prepared using similar procedures as described for Example 19, with (S)-3-aminopyrrolidin-2-one replacing 2-(3-amino-2-oxopyrrolidin-1-yl)acetic acid in Step 2. The resulting residue was purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to afford the product as TFA salt. LCMS calculated for C₂₄H₂₁F₂N₈O (M+H)⁺: 475.2; found 475.2.

Example 23. 3-(2-(2-((3-(2H-Tetrazol-5-yl)pyrrolidin-1-yl)methyl)-6-fluorobenzyl)-5-amino-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile

The title compound was prepared using similar procedures as described for Example 19, with 5-(pyrrolidin-3-yl)-2H-tetrazole replacing 2-(3-amino-2-oxopyrrolidin-1-yl)acetic acid in Step 2. The resulting residue was purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to afford the product as TFA salt. LCMS calculated for C₂₅H₂₂F₂N₁₁ (M+H)⁺: 514.2; found 514.2.

Example 24. 3-(5-Amino-2-(2-(((1-ethyl-2-oxopyrrolidin-3-yl)amino)methyl)-6-fluorobenzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile

The title compound was prepared using similar procedures as described for Example 19, with 3-amino-1-ethylpyrrolidin-2-one replacing 2-(3-amino-2-oxopyrrolidin-1-yl)acetic acid in Step 2. The resulting residue was purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to afford the product as TFA salt. LCMS calculated for C₂₆H₂₅F₂N₈O (M+H)⁺: 503.2; found 503.2.

Example 25. (S)—N-(1-(2-((5-Amino-7-(3-cyano-2-fluorophenyl)-[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)methyl)-3-fluorobenzyl)pyrrolidin-3-yl)acetamide

The title compound was prepared using similar procedures as described for Example 19, with (S)—N-(pyrrolidin-3-yl)acetamide replacing 2-(3-amino-2-oxopyrrolidin-1-yl)acetic acid in Step 2. The resulting residue was purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to afford the product as TFA salt. LCMS calculated for C₂₆H₂₅F₂N₈O (M+H)⁺: 503.2; found 503.2.

Example 26. (S)-3-(2-(2-((2-(2H-Tetrazol-5-yl)pyrrolidin-1-yl)methyl)-6-fluorobenzyl)-5-amino-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile

The title compound was prepared using similar procedures as described for Example 19, with (S)-5-(pyrrolidin-2-yl)-2H-tetrazole replacing 2-(3-amino-2-oxopyrrolidin-1-yl)acetic acid in Step 2. The resulting residue was purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to afford the product as TFA salt. LCMS calculated for C₂₅H₂₂F₂N₁₁ (M+H)⁺: 514.2; found 514.2.

Example 27. (S)-1-(2-((5-Amino-7-(3-cyano-2-fluorophenyl)-[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)methyl)-3-fluorobenzyl)pyrrolidine-3-carbonitrile

The title compound was prepared using similar procedures as described for Example 19, with (S)-pyrrolidine-3-carbonitrile replacing 2-(3-amino-2-oxopyrrolidin-1-yl)acetic acid in Step 2. The resulting residue was purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to afford the product as TFA salt. LCMS calculated for C₂₅H₂₁F₂N₈ (M+H)⁺: 471.2; found 471.2.

Example 28. 3-(5-Amino-2-(2-fluoro-6-((6-methyl-5-oxo-2,6-diazaspiro[3.4]octan-2-yl)methyl)benzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile

The title compound was prepared using similar procedures as described for Example 19, with 6-methyl-2,6-diazaspiro[3.4]octan-5-one replacing 2-(3-amino-2-oxopyrrolidin-1-yl)acetic acid in Step 2. The resulting residue was purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to afford the product as TFA salt. LCMS calculated for C₂₇H₂₅F₂N₈O (M+H)⁺: 515.2; found 515.4.

Example 29. 3-(5-Amino-2-(2-fluoro-6-(((1-methyl-2-oxopyrrolidin-3-yl)amino)methyl)benzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile

The title compound was prepared using similar procedures as described for Example 19, with 3-amino-1-methylpyrrolidin-2-one replacing 2-(3-amino-2-oxopyrrolidin-1-yl)acetic acid in Step 2. The resulting residue was purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to afford the product as TFA salt. LCMS calculated for C₂₅H₂₃F₂N₈O (M+H)⁺: 489.2; found 489.4.

Example 30. 2-(3-((2-((5-Amino-7-(3-cyano-2-fluorophenyl)-[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)methyl)-3-fluorobenzyl)(ethyl)amino)-2-oxopyrrolidin-1-yl)acetic acid

The title compound was prepared using similar procedures as described for Example 18, with 2-(3-((2-((5-amino-7-(3-cyano-2-fluorophenyl)-[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)methyl)-3-fluorobenzyl)amino)-2-oxopyrrolidin-1-yl)acetic acid replacing 3-(5-amino-2-((2-fluoro-6-((((S)-2-oxopyrrolidin-3-yl)amino)methyl)phenyl)(hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile in Step 2. The resulting residue was purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to afford the product as TFA salt. LCMS calculated for C₂₈H₂₇F₂N₈O₃(M+H)⁺: 560.2; found 560.2.

Example 31. 3-(5-Amino-2-(2-((ethyl(1-methyl-2-oxopyrrolidin-3-yl)amino)methyl)-6-fluorobenzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile

Step 1: 3-(Ethylamino)-1-methylpyrrolidin-2-one

A solution of 3-amino-1-methylpyrrolidin-2-one (360 mg, 3.2 mmol) and acetaldehyde (0.89 mL, 15.8 mmol) was stirred at r.t. for 2 h in DCM (7.5 mL). Upon full conversion of amine as detected by LCMS (pH 10), the reaction mixture was concentrated under reduced pressure. Then the residue was redissolved in DCM (7.5 mL) and methanol (2.5 mL), at which point sodium cyanoborohydride (400 mg, 6.3 mmol) was added and the reaction mixture was stirred at room temperature for 16 h. The reaction was diluted with saturated NaHCO₃ and the organics were extracted with EtOAc (3×). The combined organics were dried over MgSO₄ and concentrated. The crude product was taken forward without additional purification. LCMS calculated for C₇H₁₅N₂O (M+H)⁺: 143.1; found 143.2.

Step 2: 3-(5-Amino-2-(2-((ethyl(1-methyl-2-oxopyrrolidin-3-yl)amino)methyl)-6-fluorobenzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile

The title compound was prepared using a similar procedure as described for Example 19, with 3-(ethylamino)-1-methylpyrrolidin-2-one replacing 2-(3-amino-2-oxopyrrolidin-1-yl)acetic acid in Step 2. The resulting residue was purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to afford the product as TFA salt. LCMS calculated for C₂₇H₂₇F₂N₈O (M+H)⁺: 517.2; found 517.2.

Example 32. (R)-3-(5-Amino-2-(2-((ethyl(2-oxopyrrolidin-3-yl)amino)methyl)-6-fluorobenzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile

The title compound was prepared using similar procedures as described for Example 19, with (R)-3-(ethylamino)pyrrolidin-2-one replacing 2-(3-amino-2-oxopyrrolidin-1-yl)acetic acid in Step 2. The resulting residue was purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to afford the product as TFA salt. LCMS calculated for C₂₆H₂₅F₂N₈O (M+H)⁺: 503.2; found 503.2.

Example 33. 3-(5-Amino-2-(((6-(1-(piperidin-4-yl)-1H-pyrazol-4-yl)pyridin-2-yl)methyl)amino)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile

Step 1: 3-(5-(bis(4-methoxybenzyl)amino)-2-(((6-bromopyridin-2-yl)methyl)amino)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile

Triethyl orthoformate (637 μl, 3.83 mmol) was added to a mixture of 3-(2-amino-5-(bis(4-methoxybenzyl)amino)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile (650 mg, 1.276 mmol) and 6-bromopicolinaldehyde (475 mg, 2.55 mmol) in EtOH (8 ml). The reaction was refluxed at 120° C. over night. After cooled to room temperature, the suspension was diluted with DCM until it became a yellow colored solution, then NaBH₄ (97 mg, 2.55 mmol) was added. After stirred at room temperature for 1 h, the reaction was quenched carefully with aqueous saturated NH₄Cl and extracted two times with DCM. The combined organic layers was dried over Na₂SO₄, filtered, evaporated and the residue was purified by column chromatography (25-50% EtOAc in Hex) to give the product. LC-MS calculated for C₃₄H₂₉BrFN₈O₂ (M+H)⁺: 679.2, 681.2; found 679.2, 681.2.

Step 2: 3-(5-amino-2-(((6-(1-(piperidin-4-yl)-1H-pyrazol-4-yl)pyridin-2-yl)methyl)amino)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile

Chloro(2-dicyclohexylphosphino-2′,4′,6′-tri-i-propyl-1,1′-biphenyl)(2′-amino-1,1′-biphenyl-2-yl) palladium(II) (2.5 mg, 3.15 μmol) was added to a mixture of 3-(5-(bis(4-methoxybenzyl)amino)-2-(((6-bromopyridin-2-yl)methyl)amino)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile (21.4 mg, 0.031 mmol), tert-butyl 4-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazol-1-yl)piperidine-1-carboxylate (23.7 mg, 0.063 mmol) and Na₂CO₃ (10 mg, 0.094 mmol) in 1,4-dioxane (1 ml) and water (0.5 ml). The mixture was purged with N₂ and heated at 110° C. overnight. The mixture was evaporated to dry and TFA (1 ml) was added, then heated at 120° C. for 20 min, diluted with acetonitrile, filtered and purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to afford the product as TFA salt. LC-MS calculated for C₂₆H₂₅FN₁₁ (M+H)⁺: 510.2; found 510.2.

Example 34. 3-(5-Amino-2-(((6-(1-(2-morpholinoethyl)-1H-pyrazol-4-yl)pyridin-2-yl)methyl)amino)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile

Chloro(2-dicyclohexylphosphino-2′,4′,6′-tri-i-propyl-1,1′-biphenyl)(2′-amino-1,1′-biphenyl-2-yl) palladium(II) (2.5 mg, 3.15 μmol) was added to a mixture of 3-(5-(bis(4-methoxybenzyl)amino)-2-(((6-bromopyridin-2-yl)methyl)amino)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile from Example 33, Step 1 (21.4 mg, 0.031 mmol), 4-(2-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazol-1-yl)ethyl)morpholine (19.3 mg, 0.063 mmol) and Na₂CO₃ (10 mg, 0.094 mmol) in 1,4-dioxane (1 ml) and water (0.5 ml). The mixture was purged with N₂ and heated at 110° C. overnight. The mixture was evaporated to dry and TFA (1 ml) was added, then heated at 120° C. for 20 min, diluted with acetonitrile, filtered and purified by preparative LC-MS (pH 2, acetonitrile/water with TFA) to afford the product as TFA salt. LC-MS calculated for C₂₇H27FN₁₁O (M+H)⁺: 540.2; found 540.2.

Example A. Adenosine A2A Receptor Cyclic AMP GS Assay

Stably transfected HEK-293 cells expressing the human adenosine A2A receptor (Perkin Elmer) are maintained in MEM culture medium with 10% FBS and 400 μg/mL Geneticin (Life Technologies). 18 to 24 hours prior to assay, geneticin is removed from culture. The cisbio cAMP-GS Dynamic kit utilizing the FRET (Fluorescence Resonance Energy Transfer) technology is used to measure cAMP accumulation in the cells. Compounds of the present disclosure at an appropriate concentration are mixed with 10000 cells/well in white 96 well half area plates (Perkin Elmer) for 30 min at RT gently shaking. Agonist, CGS21680 (R&D Technologies) at 4 nM is added to each well for 60 min at room temperature gently shaking. Detection reagents, d2-labeled cAMP (acceptor) and anti-cAMP cryptate (donor) are added to each well for 60 min at room temperature gently shaking. Plates are read on Pherastar (BMG Labtech), fluorescence ratio 665/620 is calculated and EC₅₀ determination is performed by fitting the curve of percent of control versus the log of the compound concentration using GraphPad Prism.

Example B. Adenosine A2B Receptor Cyclic AMP GS Assay

Stably transfected HEK-293 cells expressing the human adenosine A2B receptor (Perkin Elmer) were maintained in MEM culture medium with 10% FBS and 100 μg/mL Geneticin (Life Technologies). 18 to 24 hours prior to assay, geneticin was removed from culture. The cisbio cAMP-GS Dynamic kit utilizing the FRET (Fluorescence Resonance Energy Transfer) technology was used to measure cAMP accumulation in the cells. Compounds of the present disclosure at an appropriate concentration were mixed with 10000 cells/well in white 96 well half area plates (Perkin Elmer) for 30 min at room temperature gently shaking. Agonist, NECA (R&D Technologies) at 12 nM was added to each well for 60 min at room temperature gently shaking. Detection reagents, d2-labeled cAMP (acceptor) and anti-cAMP cryptate (donor) were added to each well for 60 min at RT gently shaking. Plates were read on Pherastar (BMG Labtech), fluorescence ratio 665/620 was calculated and EC₅₀ determination was performed by fitting the curve of percent of control versus the log of the compound concentration using GraphPad Prism. The EC₅₀ data for the Examples obtained via this method are shown in Table B.

Example C. A2A Tag-Lite® HTRF Assay

Assays were conducted in black low volume 384-well polystyrene plates (Greiner 784076-25) in a final volume of 10 μL. Test compounds were first serially diluted in DMSO and 100 nl added to the plate wells before the addition of other reaction components. The final concentration of DMSO was 1%. Tag-Lite® Adenosine A2A labeled cells (CisBio C1TT1A2A) were diluted 1:5 into Tag-lite buffer (CisBio LABMED) and spun 1200 g for 5 mins. The pellet was resuspended at a volume 10.4× the initial cell suspension volume in Tag-lite buffer, and Adenosine A2A Receptor Red antagonist fluorescent ligand (CisBio L0058RED) added at 12.5 nM final concentration. 10 ul of the cell and ligand mix was added to the assay wells and incubated at room temperature for 45 minutes before reading on a PHERAstar FS plate reader (BMG Labtech) with HTRF 337/620/665 optical module. Percent binding of the fluorescent ligand was calculated; where 100 nM of A2A antagonist control ZM 241385 (Tocris 1036) displaces the ligand 100% and 1% DMSO has 0% displacement. The % binding data versus the log of the inhibitor concentration was fitted to a one-site competitive binding model (GraphPad Prism version 7.02) where the ligand constant=12.5 nM and the ligand Kd=1.85 nM. The K_(i) data for the Examples obtained via this method are shown in Table B.

Example D. A2B Filter Binding Assay

Assays are conducted in deep well polypropylene plates (Greiner 786201) in a final volume of 550 μL. Test compounds are first serially diluted in DMSO and 5.5 ul is then added to the plate wells before the addition of other reaction components. The final concentration of DMSO is 3%. HEK293 cell membranes overexpressing the human adenosine receptor A2B (Perkin Elmer ES-113-M400UA) are diluted to 40 μg/mL in 50 mM HEPES pH 7.0, 5 mM MgCl₂, 1 mM EDTA (Assay buffer). [3H] 8-cyclopentyl-1,3-dipropylxanthine (Perkin Elmer NET974001MC) is diluted in assay buffer+22% DMSO to 24.2 nM, and then further diluted to 1 nM by addition to the diluted membranes. 545 μl of the membrane and ligand mix is added to the assay wells and incubated on a shaker at room temperature for 1 hour. The membrane mix is then filtered over a UniFilter GF/C filter plate (Perkin Elmer 6005174) pre-soaked in 50 mM HEPES pH 6.5, 5 mM MgCl₂, 1 mM EDTA 0.5% BSA and then washed with 5 mL ice cold 50 mM HEPES pH 6.5, 5 mM MgCl₂, 1 mM EDTA 0.2% BSA. 50 μl MicroScint™ cocktail (Perkin Elmer 6013621) is added and plates are read on a Topcount NXT FS (Perkin Elmer). Percent binding of the [3H] ligand is calculated, where 1000 nM of LUF 5834 (Tocris 4603) control displaces the ligand 100% and 3% DMSO has 0% displacement. The % binding data versus the log of the inhibitor concentration is fitted to a one-site competitive binding model (GraphPad Prism version 7.02) where the ligand constant=2 nM and the ligand Kd=13 nM.

Example E. A1 and A3 SPA Binding Assays

Both assays are conducted in white 384-well polystyrene plates (Greiner 781075) in a final volume of 50 μL. Inhibitors are first serially diluted in DMSO and 100 nL is added to the plate wells before the addition of other reaction components. The final concentration of DMSO is 2%.

Wheatgerm agglutinin-coated yttrium silicate SPA beads (Perkin Elmer RPNQ0023) and CHO-K1 cell membranes overexpressing each human adeonsine receptor are incubated in 50 mM HEPES pH 7.0, 5 mM MgCl₂, 1 mM EDTA (Assay buffer) on a rotary stirrer for 2 hours at 4° C. The beads are pelleted by centrifugation at 6000 g for one minute, and then the supernatant with unbound membrane is discarded. The beads are re-suspended to the original volume in assay buffer. Each radioligand is diluted in assay buffer+22% DMSO at 12.2× the final concentration, and then added to the SPA bead suspension. 50 μl of the SPA bead reaction mix is added to the assay wells and the plates shaken at 600 rpm for 1 hour at room temperature. The beads are then allowed to settle for 1 hour before reading on a Topcount NXT FS (Perkin Elmer). Percent binding of the radiolabeled ligand is calculated, where a control at >100× Ki displaces the ligand 100% and 2% DMSO has 0% displacement. The % binding data versus the log of the inhibitor concentration is fitted to a one-site competitive binding model (GraphPad Prism version 7.02). Assay conditions are provided in Table A below.

TABLE A Assay Component A1 A3 SPA beads in 3 mg/mL 1.25 mg/mL Hepes buffer Membrane 60 μg/mL 20 μg/mL Perkin Elmer ES-010 Perkin Elemer ES-012 Radioligand 1 nM [3H]DP-CPX 0.1 nM [125I] MECA (Perkin Elmer NET974) (Perkin Elmer NEX312) K_(D) = 1nM K_(D) = 0.8nM Control 1 μM DPCPX 0.1 μM IB-MECA (Tocris 0439) (Tocris 1066)

The A_(2A)_Ki data and A_(2B)_cAMP_EC₅₀ data are provided below in Table B. The symbol “†” indicates A_(2A)_Ki or A_(2B)_cAMP_EC₅₀≤10 nM, “††” indicates A_(2A)_Ki or A_(2B)_cAMP_EC₅₀>10 nM but ≤100 nM. “†††” indicates A_(2A)_Ki or A_(2B)_cAMP_EC₅₀>100 nM but ≤1 μM; and “††††” indicates A_(2A)_Ki or A_(2B)_cAMP_EC₅₀ is greater than 1 μM.

TABLE B Ex. A_(2A)_Ki A_(2B)_cAMP_EC₅₀ No. (nM) (nM) 1 † † 2 † † 3 † † 4 † ††† 5 † ††† 6 † ††† 7 † †† 8 † ††† 9 † †† 10 † ††† 11 † †† 12 † †††† 13 † †† 14 † † 15 † † 16 † †† 17 † †† 18 † † 19 † †† 20 † † 21 † † 22 † † 23 † †† 24 † †† 25 † †† 26 † † 27 † †† 28 † †† 29 † †† 30 † † 31 † † 32 † †† 33 † † 34 † ††

Various modifications of the invention, in addition to those described herein, will be apparent to those skilled in the art from the foregoing description. Such modifications are also intended to fall within the scope of the appended claims. Each reference, including all patent, patent applications, and publications, cited in the present application is incorporated herein by reference in its entirety. 

What is claimed is:
 1. A compound of Formula (I):

or a pharmaceutically acceptable salt thereof, wherein: R¹ is selected from H, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, C(O)R^(b1), C(O)NR^(c1)R^(d1), C(O)OR^(a1), C(═NR^(e1))R^(b1), C(═NR^(e1))NR^(c1)R^(d1), S(O)₂R^(b1), and S(O)₂NR^(c1)R^(d1), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, and C₁₋₆ haloalkyl of R¹ are each optionally substituted with 1, 2, 3, or 4 independently selected R^(1A) substituents; each R^(a1), R^(b1), R^(c1), and R^(d1) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl, wherein the C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl of R^(a1), R^(b1), R^(c1), and R^(d1) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(1A) substituents; each R^(e1) is independently selected from H, OH, CN, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, and C₂₋₆ alkynyl; each R^(1A) is independently selected from OH, CN, halo, C₁₋₃ alkyl, C₂₋₃ alkenyl, C₂₋₃ alkynyl, C₁₋₃ haloalkyl, C₁₋₃ alkoxy, C₁₋₃ haloalkoxy, amino, C₁₋₃ alkylamino, and di(C₁₋₃ alkyl)amino; R² is selected from H, D, halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-, CN, NO₂, OR^(a2), SR^(a2), NHOR^(a2), C(O)R^(b2), C(O)NR^(c2)R^(d2), C(O)NR^(c2)(OR^(a2)), C(O)OR^(a2), OC(O)R^(b2), OC(O)NR^(c2)R^(d2), NR^(c2)R^(d2), NR^(c2)NR^(c2)R^(d2), NR^(c2)C(O)R^(b2), NR^(c2)C(O)OR^(a2), NR^(c2)C(O)NR^(c2)R^(d2), C(═NR^(e2))R^(b2), C(═NOH)R^(b2), C(═NCN)R^(b2), C(═NR^(e2))NR^(c2)R^(d2), NR^(c2)C(═NR^(e2))NR^(c2)R^(d2), NR^(c2)C(═NOH)NR^(c2)R^(d2), NR^(c2)C(═NCN)NR^(c2)R^(d2), NR^(c2)C(═NR^(e2))R^(b2), NR^(c2)S(O)NR^(c2)R^(d2), NR^(c2)S(O)R^(b2), NR^(c2)S(O)₂R^(b2), NR^(c2)S(O)(═NR^(e2))R^(b2), NR^(c2)S(O)₂NR^(c2)R^(b2), S(O)R^(b2), S(O)NR^(c2)R^(d2), S(O)₂NR^(c2)R^(d2), OS(O)(═NR^(e2))R^(b2), OS(O)₂R^(b2), SF₅, P(O)R^(f2)R^(g2), OP(O)(OR^(h2))(OR^(i2)), P(O)(OR^(h2))(OR^(i2)), and BR^(j2)R^(k2), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl- of R² are each optionally substituted with 1, 2, 3, or 4 independently selected R^(2A) substituents; each R^(a2), R^(b2), R^(c2), and R^(d2), is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl- of R^(a2), R^(b2), R^(ce) and R^(d2) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(2A) substituents; or, any R^(c2) and R^(d2), attached to the same N atom, together with the N atom to which they are attached, form a 4-10 membered heterocycloalkyl group, wherein the 4-10 membered heterocycloalkyl group is optionally substituted with 1, 2, 3, or 4 independently selected R^(2A) substituents; each R^(e2) is independently selected from H, OH, CN, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, and C₂₋₆ alkynyl; each R^(f2) and R^(g2) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered hetereocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered hetereocycloalkyl)-C₁₋₆ alkyl-; each R^(h2) and R^(i2) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered hetereocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered hetereocycloalkyl)-C₁₋₆ alkyl-; each R^(j2) and R^(k2) is independently selected from OH, C₁₋₆ alkoxy, and C₁₋₆ haloalkoxy; or any R^(j2) and R^(k2) attached to the same B atom, together with the B atom to which they are attached, form a 5- or 6-membered heterocycloalkyl group optionally substituted with 1, 2, 3, or 4 substituents independently selected from C₁₋₆ alkyl and C₁₋₆ haloalkyl; each R^(2A) is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-, CN, NO₂, OR^(a21), SR^(a21), NHOR^(a21), C(O)R^(b21), C(O)NR^(c21)R^(d21), C(O)NR^(c21)(OR^(a21)), C(O)OR^(a21), OC(O)R^(b21), OC(O)NR^(c21)R^(d21), NR^(c21)R^(d21), NR^(c21)NR^(c21)R^(d21), NR^(c21)C(O)R^(b21), NR^(c21)C(O)OR^(a21), NR^(c21)C(O)NR^(c21)R^(d21), C(═NR^(e21))R^(b21), C(═NOH)R^(b21), C(═NCN)NR^(b21), C(═NR^(e21))NR^(c21)R^(d21), NR^(c21)C(═NR^(e21))NR^(c21)R^(d21), NR^(c21)C(═NOH)NR^(c21)R^(d21), NR^(c21)C(═NCN)NR^(c21)R^(d21), NR^(c21)C(═NR^(e21))R^(b21), NR^(c21)S(O)NR^(c21)R^(d21), NR^(c21)S(O)R^(b21), NR^(c21)S(O)₂R^(b21), NR^(c21)S(O)(═NR^(e21))R^(b21), NR^(c21)S(O)₂NR^(c21)R^(d21), S(O)R^(b21), S(O)NR^(c21)R^(d21), S(O)₂R^(b21), S(O)₂NR^(c21)R^(d21), OS(O)(═NR^(e21))R^(b21), OS(O)₂R^(b21), SF₅, P(O)R^(f21)R^(g21), OP(O)(OR^(h21))(OR^(i21)), P(O)(OR^(h21))(OR^(i21)), and BR^(j21)R^(k21), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl- of R^(2A) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(2B) substituents; each R^(a21), R^(b21), R^(c21) and R^(d21) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl- of R^(a21), R^(b21), R^(c21) and R^(d21) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(2B) substituents; or, any R^(c21) and R^(d21), attached to the same N atom, together with the N atom to which they are attached, form a 4-, 5-, 6-, or 7-membered heterocycloalkyl group, wherein the 4-, 5-, 6-, or 7-membered heterocycloalkyl group is optionally substituted with 1, 2, 3, or 4 independently selected R^(2B) substituents; each R^(e21) is independently selected from H, OH, CN, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, and C₂₋₆ alkynyl; each R^(f21) and R^(g21) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered hetereocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered hetereocycloalkyl)-C₁₋₆ alkyl-; each R^(h21) and R^(i21) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered hetereocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered hetereocycloalkyl)-C₁₋₆ alkyl-; each R^(j21) and R^(k21) is independently selected from OH, C₁₋₆ alkoxy, and C₁₋₆ haloalkoxy; or any R^(j21) and R^(k21) attached to the same B atom, together with the B atom to which they are attached, form a 5- or 6-membered heterocycloalkyl group optionally substituted with 1, 2, 3, or 4 substituents independently selected from C₁₋₆ alkyl and C₁₋₆ haloalkyl; each R^(2B) is independently selected from OH, NO₂, CN, halo, C₁₋₃ alkyl, C₂₋₃ alkenyl, C₂₋₃ alkynyl, C₁₋₃ haloalkyl, cyano-C₁₋₃ alkyl, HO—C₁₋₃ alkyl, C₁₋₃ alkoxy-C₁₋₃ alkyl, C₃₋₅ cycloalkyl, C₁₋₃ alkoxy, C₁₋₃ haloalkoxy, amino, C₁₋₃ alkylamino, di(C₁₋₃ alkyl)amino, thio, C₁₋₃ alkylthio, C₁₋₃ alkylsulfinyl, C₁₋₃ alkylsulfonyl, carbamyl, C₁₋₃ alkylcarbamyl, di(C₁₋₃ alkyl)carbamyl, carboxy, C₁₋₃ alkylcarbonyl, C₁₋₄ alkoxycarbonyl, C₁₋₃ alkylcarbonylamino, C₁₋₃ alkoxycarbonylamino, C₁₋₃ alkylcarbonyloxy, aminocarbonyloxy, C₁₋₃ alkylaminocarbonyloxy, di(C₁₋₃ alkyl)aminocarbonyloxy, C₁₋₃ alkylsulfonylamino, aminosulfonyl, C₁₋₃ alkylaminosulfonyl, di(C₁₋₃ alkyl)aminosulfonyl, aminosulfonylamino, C₁₋₃ alkylaminosulfonylamino, di(C₁₋₃ alkyl)aminosulfonylamino, aminocarbonylamino, C₁₋₃ alkylaminocarbonylamino, and di(C₁₋₃ alkyl)aminocarbonylamino; X³ is N; Cy¹ is selected from C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, and 4-10 membered heterocycloalkyl, wherein the C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, and 4-10 membered heterocycloalkyl of Cy¹ are each optionally substituted with 1, 2, 3, or 4 independently selected R⁷ substituents; each R⁷ is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-, CN, NO₂, OR^(a7), SR^(a7), NHOR^(a7), C(O)R^(b7), C(O)NR^(c7)R^(d7), C(O)NR^(c7)(OR^(a7)), C(O)OR^(a7), OC(O)R^(b7), OC(O)NR^(c7)R^(d7), NR^(c7)R^(d7), NR^(c7)NR^(c7)R^(d7), NR^(c7)C(O)R^(b7), NR^(c7)C(O)OR^(a7), NR^(c7)C(O)NR^(c7)R^(d7), C(═NR^(e7))R^(b7), C(═NOH)R^(b7), C(═NCN)R^(b7), C(═NR^(e7))NR^(c7)R^(d7), NR^(c7)C(═NR^(e7))NR^(c7)R^(d7), NR^(c7)C(═NOH)NR^(c7)R^(d7), NR^(c7)C(═NCN)NR^(c7)R^(d7), NR^(c7)C(═NR^(e7))R^(b7), NR^(c7)S(O)NR^(c7)R^(d7), NR^(c7)S(O)R^(b7), NR^(c7)S(O)₂R^(b7), NR^(c7)S(O)(═NR^(e7))R^(b7), NR^(c7)S(O)₂NR^(c7)R^(d7), S(O)R^(b7), S(O)NR^(c7)R^(d7), S(O)₂R^(b7), S(O)₂NR^(c7)R^(d7), OS(O)(═NR^(e7))R^(b7), OS(O)₂R^(b7), SF₅, P(O)R^(f7)R^(g7), OP(O)(OR^(h7))(OR^(i7)), P(O)(OR^(h7))(OR^(i7)), and BR^(j7)R^(k7), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl- of R⁷ are each optionally substituted with 1, 2, 3, or 4 independently selected R^(7A) substituents; each R^(a7), R^(b7), R^(c7), and R^(d7) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl- of R^(a7), R^(b7), R^(c7) and R^(d7) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(7A) substituents; or, any R^(c7) and R^(d7), attached to the same N atom, together with the N atom to which they are attached, form a 4-, 5-, 6-, or 7-membered heterocycloalkyl group, wherein the 4-, 5-, 6-, or 7-membered heterocycloalkyl group is optionally substituted with 1, 2, 3, or 4 independently selected R^(7A) substituents; each R^(d7) is independently selected from H, OH, CN, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, and C₂₋₆ alkynyl; each R^(f7) and R^(g7) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered hetereocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered hetereocycloalkyl)-C₁₋₆ alkyl-; each R^(h7) and R^(i7) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered hetereocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered hetereocycloalkyl)-C₁₋₆ alkyl-; each R^(j7) and R^(k7) is independently selected from OH, C₁₋₆ alkoxy, and C₁₋₆ haloalkoxy; or any R^(j7) and R^(k7) attached to the same B atom, together with the B atom to which they are attached, form a 5- or 6-membered heterocycloalkyl group optionally substituted with 1, 2, 3, or 4 substituents independently selected from C₁₋₆ alkyl and C₁₋₆ haloalkyl; each R^(7A) is independently selected from OH, NO₂, CN, halo, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, cyano-C₁₋₆ alkyl, HO—C₁₋₆ alkyl, C₁₋₆ alkoxy-C₁₋₆ alkyl, C₃₋₅ cycloalkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkoxy, amino, C₁₋₆ alkylamino, di(C₁₋₆ alkyl)amino, thio, C₁₋₆ alkylthio, C₁₋₆ alkylsulfinyl, C₁₋₆ alkylsulfonyl, carbamyl, C₁₋₆ alkylcarbamyl, di(C₁₋₆ alkyl)carbamyl, carboxy, C₁₋₆ alkylcarbonyl, C₁₋₄ alkoxycarbonyl, C₁₋₆ alkylcarbonylamino, C₁₋₆ alkoxycarbonylamino, C₁₋₆ alkylcarbonyloxy, aminocarbonyloxy, C₁₋₆ alkylaminocarbonyloxy, di(C₁₋₆ alkyl)aminocarbonyloxy, C₁₋₆ alkylsulfonylamino, aminosulfonyl, C₁₋₆ alkylaminosulfonyl, di(C₁₋₆ alkyl)aminosulfonyl, aminosulfonylamino, C₁₋₆ alkylaminosulfonylamino, di(C₁₋₆ alkyl)aminosulfonylamino, aminocarbonylamino, C₁₋₆ alkylaminocarbonylamino, and di(C₁₋₆ alkyl)aminocarbonylamino; R⁴ is selected from —C(O)NR⁵R⁶ and -L-Cy⁴; L is selected from Y¹, C₁₋₆ alkylene, C₂₋₆ alkenylene, C₂₋₆ alkynylene, C₁₋₆ alkylene-Y¹, Y¹—C₁₋₆ alkylene, C₁₋₆ alkylene-Y¹—C₁₋₆ alkylene, Y¹—C₁₋₆ alkylene-Y¹—, Y¹—C₁₋₆ alkylene-Y¹—C₁₋₆ alkylene, and C₁₋₆ alkylene-Y¹—C₁₋₆ alkylene-Y¹, wherein said alkylene, alkenylene, and alkynylene linking groups are each optionally substituted with 1, 2, or 3 substituents independently selected from R^(8D) and R⁸; each Y¹ is independently selected from —C(O)—, —C(O)NR^(Y)—, —NR^(Y)—, —NR^(Y)C(O)—, —NR^(Y)C(O)O—, —NR^(Y)C(O)NR^(Y)—, —NR^(Y)S(O)₂—, —S(O)₂—, —S(O)₂NR^(Y)—, and —NR^(Y)S(O)₂NR^(Y)—; each R^(Y) is independently selected from H, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-, and S(O)₂R^(b5), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl- of R^(Y) is optionally substituted with 1, 2, 3, or 4 substituents independently selected from R^(8D) and R⁸; Cy⁴ is selected from C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, and 4-10 membered heterocycloalkyl, each of which are optionally substituted with 1, 2, 3, 4, or 5 substituents independently selected from R^(8D) and R⁸; R⁵ and R⁶ are each independently selected from H, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, and S(O)₂R^(b5); each R^(b5) is independently selected from C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₃₋₇ cycloalkyl, 4-7 membered heterocycloalkyl, C₃₋₇ cycloalkyl-C₁₋₆ alkyl-, and (4-7 membered heterocycloalkyl)-C₁₋₆ alkyl-; each R⁸ is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-, CN, NO₂, OR^(a8), SR^(a8), NHOR^(a8), C(O)R^(b8), C(O)NR^(c8)R^(d8), C(O)NR^(c8)(OR^(a8)), C(O)OR^(a8), OC(O)R^(b8), OC(O)NR^(c8)R^(d8), NR^(c8)R^(d8), NR^(c8)NR^(c8)R^(d8), NR^(c8)C(O)R^(b8), NR^(c8)C(O)OR^(a8), NR^(c8)C(O)NR^(c8)R^(d8), C(═NR^(e8))R^(b8), C(═NOH)R^(b8), C(═NCN)R^(b8), C(═NR^(e8))NR^(c8)R^(d8), NR^(c8)C(═NR^(e8))NR^(c8)R^(d8), NR^(c8)C(═NOH)NR^(c8)R^(d8), NR^(c8)C(═NCN)NR^(c8)R^(d8), NR^(c8)C(═NR^(e8))R^(b8), NR^(c8)S(O)NR^(c8)R^(d8), NR^(c8)S(O)R^(b8), NR^(c8)S(O)₂R^(b8), NR^(c8)S(O)(═NR^(e8))R^(b8), NR^(c8)S(O)₂NR^(c8)R^(d8), S(O)NR^(b8), S(O)NR^(c8)R^(d8), S(O)₂R^(b8), S(O)₂NR^(c8)R^(d8), OS(O)(═NR^(e8))R^(b8), OS(O)₂R^(b8), SF₅, P(O)R^(f8)R^(g8), OP(O)(OR^(h8))(OR^(i8)), P(O)(OR^(h8))(OR^(i8)), and BR^(j8)R^(k8), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl- of R⁸ are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8A) substituents; each R^(a8), R^(b8), R^(c8), and R^(d8) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl- of R^(a8), R^(b8), R^(c8) and R^(d8) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8A) substituents; or, any R^(c8) and R^(d8), attached to the same N atom, together with the N atom to which they are attached, form a 4-10 membered heterocycloalkyl group, wherein the 4-10 membered heterocycloalkyl group is optionally substituted with 1, 2, 3, or 4 independently selected R^(8A) substituents; each R^(e8) is independently selected from H, OH, CN, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, and C₂₋₆ alkynyl; each R^(f8) and R^(g8) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered hetereocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered hetereocycloalkyl)-C₁₋₆ alkyl-; each R^(h8) and R^(i8) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered hetereocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered hetereocycloalkyl)-C₁₋₆ alkyl-; each R^(j8) and R^(k8) is independently selected from OH, C₁₋₆ alkoxy, and C₁₋₆ haloalkoxy; or any R^(j8) and R^(k8) attached to the same B atom, together with the B atom to which they are attached, form a 5- or 6-membered heterocycloalkyl group optionally substituted with 1, 2, 3, or 4 substituents independently selected from C₁₋₆ alkyl and C₁₋₆ haloalkyl; each R^(8A) is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-, CN, NO₂, OR^(a81), SR^(a81), NHOR^(a81), C(O)R^(b81), C(O)NR^(c81)R^(d81), C(O)NR^(c81)(OR^(a81)), C(O)OR^(a81), OC(O)R^(b81), OC(O)NR^(c81)R^(d81), NR^(c81)R^(d81), NR^(c81)NR^(c81)R^(d81), NR^(c81)C(O)R^(b81), NR^(c81)C(O)OR^(a81), NR^(c81)C(O)NR^(c81)R^(d81), C(═NR^(e81))R^(b81), C(═NOH)R^(b81), C(═NCN)R^(b81), C(═NR^(e81))NR^(c81)R^(d81), NR^(c81)C(═NR^(e81))NR^(c81)R^(d81), NR^(c81)C(═NOH)NR^(c81)R^(d81), NR^(c81)C(═NCN)NR^(c81)R^(d81), NR^(c81)C(═NR^(e81))R^(b81), NR^(c81)S(O)NR^(c81)R^(d81), NR^(C81)S(O)R^(b81), NR^(c81)S(O)₂R^(b81), NR^(c81)S(O)R^(b81)R^(b81), NR^(c81)S(O)₂NR^(c81)R^(d81), S(O)R^(b81), S(O)NR^(c81)R^(d81), S(O)₂R^(b81), S(O)₂NR^(c81)R^(d81), OS(O)(═NR^(e81))R^(b81), OS(O)₂R^(b81), SF₅, P(O)R^(f81)R^(g81), OP(O)(OR^(h81))(OR^(i81)), P(O)(OR^(h81))(OR^(i81)), and BR^(j81)R^(k81), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl- of R^(8A) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8B) substituents; each R^(a81), R^(b81), R^(c81) and R^(d81) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl- of R^(a81), R^(b81), R^(c81) and R^(d81) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8B) substituents; or, any R^(c81) and R^(d81), attached to the same N atom, together with the N atom to which they are attached, form a 4-10 membered heterocycloalkyl group, wherein the 4-10 membered heterocycloalkyl group is optionally substituted with 1, 2, 3, or 4 independently selected R^(8B) substituents; each R^(e81) is independently selected from H, OH, CN, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, and C₂₋₆ alkynyl; each R^(f81) and R^(g81) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered hetereocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered hetereocycloalkyl)-C₁₋₆ alkyl-; each R^(h81) and R^(i81) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered hetereocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered hetereocycloalkyl)-C₁₋₆ alkyl-; each R^(j81) and R^(k81) is independently selected from OH, C₁₋₆ alkoxy, and C₁₋₆ haloalkoxy; or any R^(j81) and R^(k81) attached to the same B atom, together with the B atom to which they are attached, form a 5- or 6-membered heterocycloalkyl group optionally substituted with 1, 2, 3, or 4 substituents independently selected from C₁₋₆ alkyl and C₁₋₆ haloalkyl; each R^(8B) is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-, CN, NO₂, OR^(a82), SR^(a82), NHOR^(a82), C(O)R^(b82), C(O)NR^(c82)R^(d82), C(O)NR^(c82)(OR^(a82)), C(O)OR^(a82), OC(O)R^(b82), OC(O)NR_(c82)R^(d82), NR^(c82)R^(d82), NR^(c82)NR^(c82)R^(d82), NR^(c82)C(O)R^(b82), NR^(c82)C(O)OR^(a82), NR^(c82)C(O)NR^(c82)R^(d82), C(═NR^(e82))R^(b82), C(═NOH)R^(b82), C(═NCN)R^(b82), C(═NR^(e82))NR^(c82)R^(d82), NR^(c82)C(═NR^(e82))NR^(c82)R^(d82), NR^(c82)C(═NOH)NR^(c82)R^(d82), NR^(c82)C(═NCN)NR^(c82)R^(d82), NR^(c82)C(═NR^(e82))R^(b82), NR^(c82)S(O)NR^(c82)R^(d82), NR^(c82)S(O)R^(b82), NR^(c82)S(O)₂R^(b82), NR^(c82)S(O)(═NR^(e82))R^(b82), NR^(c82)S(O)₂NR^(c82)R^(d82), S(O)R^(b82), S(O)NR^(c82)R^(d82), S(O)₂R^(b82), S(O)₂NR^(c82)R^(d82), OS(O)(═NR^(e82))R^(b82), OS(O)₂R^(b82), SF₅, P(O)R^(f82)R^(g82), OP(O)(OR^(h82))(OR^(i82)), P(O)(OR^(h82))(OR^(i82)), and BR^(j82)R^(k82), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl- of R^(8B) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8C) substituents; each R^(a82), R^(b82), R^(c82), and R^(d82) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl- of R^(a82), R^(b82), R^(c82) and R^(d82) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8C) substituents; or, any R^(c82) and R^(d82), attached to the same N atom, together with the N atom to which they are attached, form a 4-, 5-, 6-, or 7-membered heterocycloalkyl group, wherein the 4-, 5-, 6-, or 7-membered heterocycloalkyl group is optionally substituted with 1, 2, 3, or 4 independently selected R^(8C) substituents; each R^(e82) is independently selected from H, OH, CN, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, and C₂₋₆ alkynyl; each R^(f82) and R^(g82) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-; each R^(h82) and R^(i82) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₆₋₁₀ aryl, C₃₋₁₀ cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C₆₋₁₀ aryl-C₁₋₆ alkyl-, C₃₋₁₀ cycloalkyl-C₁₋₆ alkyl-, (5-10 membered heteroaryl)-C₁₋₆ alkyl-, and (4-10 membered heterocycloalkyl)-C₁₋₆ alkyl-; each R^(j82) and R^(k82) is independently selected from OH, C₁₋₆ alkoxy, and C₁₋₆ haloalkoxy; or any R^(j82) and R^(k82) attached to the same B atom, together with the B atom to which they are attached, form a 5- or 6-membered heterocycloalkyl group optionally substituted with 1, 2, 3, or 4 substituents independently selected from C₁₋₆ alkyl and C₁₋₆ haloalkyl; each R^(8C) is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₆ alkyl-, C₃₋₇ cycloalkyl-C₁₋₆ alkyl-, (5-6 membered heteroaryl)-C₁₋₆ alkyl-, (4-7 membered heterocycloalkyl)-C₁₋₆ alkyl-, CN, NO₂, OR^(a83), SR^(a83), NHOR^(a83), C(O)R^(b83), C(O)NR^(c83)R^(d83), C(O)NR^(c83)(OR^(a83)), C(O)OR^(a83), OC(O)R^(b83), OC(O)NR^(c83)R^(d83), NR^(c83)R^(d83), NR^(c83)NR^(c83)R^(d83), NR^(c83)C(O)R^(b83), NR^(c83)C(O)OR^(a83), NR^(c83)C(O)NR^(c83)R^(d83), C(═NR^(e83))R^(b83), C(═NOH)R^(b83), C(═NCN)R^(b83), C(═NR^(e83))NR^(c83)R^(d83), NR^(c83)C(═NR^(e83))NR^(c83)R^(d83), NR^(c83)C(═NOH)NR^(c83)R^(d83), NR^(c83)C(═NCN)NR^(c83)R^(d83), NR^(c83)C(═NR^(e83))R^(b83), NR^(c83)S(O)NR^(c83)R^(d83), NR^(c83)S(O)R^(b83), NR^(c83)S(O)₂R^(b83), NR^(c83)S(O)(═NR^(e83))R^(b83), NR^(c83)S(O)₂NR^(c83)R^(d83), S(O)R^(b83), S(O)NR^(c83)R^(d83), S(O)₂R^(b83), S(O)₂NR^(c83)R^(d83), OS(O)(═NR^(e83))R^(b83), OS(O)₂R^(b83), SF₅, P(O)R^(f83)R^(g83), OP(O)(OR^(h83))(OR^(i83)), P(O)(OR^(h83))(OR^(i83)), and BR^(j83)R^(k83), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₆ alkyl-, C₃₋₇ cycloalkyl-C₁₋₆ alkyl-, (5-6 membered heteroaryl)-C₁₋₆ alkyl-, and (4-7 membered heterocycloalkyl)-C₁₋₆ alkyl- of R^(8C) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8D) substituents; each R^(a83), R^(b83), R^(c83), and R^(d83) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₆ alkyl-, C₃₋₇ cycloalkyl-C₁₋₆ alkyl-, (5-6 membered heteroaryl)-C₁₋₆ alkyl-, and (4-7 membered heterocycloalkyl)-C₁₋₆ alkyl-, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₆ alkyl-, C₃₋₇ cycloalkyl-C₁₋₆ alkyl-, (5-6 membered heteroaryl)-C₁₋₆ alkyl-, and (4-7 membered heterocycloalkyl)-C₁₋₆ alkyl- of R^(a83), R^(b83), R^(c83) and R^(d83) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8D) substituents; or, any R^(c83) and R^(d83), attached to the same N atom, together with the N atom to which they are attached, form a 4-, 5-, 6-, or 7-membered heterocycloalkyl group, wherein the 4-, 5-, 6-, or 7-membered heterocycloalkyl group is optionally substituted with 1, 2, 3, or 4 independently selected R^(8D) substituents; each R^(e83) is independently selected from H, OH, CN, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, and C₂₋₆ alkynyl; each R^(f83) and R^(g83) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkyl, C₁₋₆ haloalkoxy, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₆ alkyl-, C₃₋₇ cycloalkyl-C₁₋₆ alkyl-, (5-6 membered heteroaryl)-C₁₋₆ alkyl-, and (4-7 membered heterocycloalkyl)-C₁₋₆ alkyl-; each R^(h83) and R^(i83) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₆ alkyl-, C₃₋₇ cycloalkyl-C₁₋₆ alkyl-, (5-6 membered heteroaryl)-C₁₋₆ alkyl-, and (4-7 membered heterocycloalkyl)-C₁₋₆ alkyl-; each R^(j83) and R^(k83) is independently selected from OH, C₁₋₆ alkoxy, and C₁₋₆ haloalkoxy; or any R^(j83) and R^(k83) attached to the same B atom, together with the B atom to which they are attached, form a 5- or 6-membered heterocycloalkyl group optionally substituted with 1, 2, 3, or 4 substituents independently selected from C₁₋₆ alkyl and C₁₋₆ haloalkyl; and each R^(8D) is independently selected from OH, NO₂, CN, halo, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, cyano-C₁₋₆ alkyl, HO—C₁₋₆ alkyl, C₁₋₆ alkoxy-C₁₋₆ alkyl, C₃₋₅ cycloalkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkoxy, amino, C₁₋₆ alkylamino, di(C₁₋₆ alkyl)amino, thio, C₁₋₆ alkylthio, C₁₋₆ alkylsulfinyl, C₁₋₆ alkylsulfonyl, carbamyl, C₁₋₆ alkylcarbamyl, di(C₁₋₆ alkyl)carbamyl, carboxy, C₁₋₆ alkylcarbonyl, C₁₋₄ alkoxycarbonyl, C₁₋₆ alkylcarbonylamino, C₁₋₆ alkoxycarbonylamino, C₁₋₆ alkylcarbonyloxy, aminocarbonyloxy, C₁₋₆ alkylaminocarbonyloxy, di(C₁₋₆ alkyl)aminocarbonyloxy, C₁₋₆ alkylsulfonylamino, aminosulfonyl, C₁₋₆ alkylaminosulfonyl, di(C₁₋₆ alkyl)aminosulfonyl, aminosulfonylamino, C₁₋₆ alkylaminosulfonylamino, alkyl)aminosulfonylamino, aminocarbonylamino, C₁₋₆ alkylaminocarbonylamino, and di(C₁₋₆ alkyl)aminocarbonylamino.
 2. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein 1, 2, 3, 4, 5, 6, 7, or 8 hydrogen atoms, attached to carbon atoms of “alkyl”, “alkenyl”, “alkynyl”, “aryl”, “phenyl”, “cycloalkyl”, “heterocycloalkyl”, or “heteroaryl” substituents or “—C₁₋₆ alkyl-”, “alkylene”, “alkenylene” and “alkynylene” linking groups, are replaced by deuterium atoms.
 3. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein R¹ is H or C₁₋₆ alkyl.
 4. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein R² is selected from H, D, halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, CN, NO₂, oR^(a2), NHOR^(a2), C(O)R^(b2), C(O)NR^(c2)R^(d2), C(O)NR^(c2)(OR^(a2)), C(O)OR^(a2), NR^(c2)R^(d2), NR^(c2)C(O)R^(b2), NR^(c2)C(O)OR^(a2), NR^(c2)C(O)NR^(c2)R^(d2), NR^(c2)S(O)₂R^(b2), NR^(c2)S(O)₂NR^(c2)R^(d2), S(O)₂R^(b2), and S(O)₂NR^(c2)R^(d2), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl of R² are each optionally substituted with 1, 2, 3, or 4 independently selected R^(2A) substituents; each R^(a2), R^(b2), R^(c2), and R^(d2) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl of R^(a2), R^(b2), R^(c2), and R^(d2) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(2A) substituents; and each R^(2A) is independently selected from D, OH, CN, halo, C₁₋₃ alkyl, C₂₋₃ alkenyl, C₂₋₃ alkynyl, C₁₋₃ haloalkyl, C₁₋₃ alkoxy, C₁₋₃ haloalkoxy, amino, C₁₋₃ alkylamino, and di(C₁₋₃ alkyl)amino.
 5. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein R² is selected from H, D, halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, and CN, wherein the C₁₋₆ alkyl of R² is optionally substituted with 1 or 2 independently selected R^(2A) substituents; and each R^(2A) is independently selected from OH, CN, halo, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, cyano-C₁₋₆ alkyl, HO—C₁₋₆ alkyl, C₃₋₅ cycloalkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkoxy, amino, C₁₋₆ alkylamino, di(C₁₋₆ alkyl)amino, thio, C₁₋₆ alkylthio, C₁₋₆ alkylsulfinyl, C₁₋₆ alkylsulfonyl, carbamyl, C₁₋₆ alkylcarbamyl, di(C₁₋₆ alkyl)carbamyl, carboxy, C₁₋₆ alkylcarbonyl, C₁₋₄ alkoxycarbonyl, C₁₋₆ alkylcarbonylamino, C₁₋₆ alkoxycarbonylamino, C₁₋₆ alkylcarbonyloxy, aminocarbonyloxy, C₁₋₆ alkylaminocarbonyloxy, di(C₁₋₆ alkyl)aminocarbonyloxy, C₁₋₆ alkylsulfonylamino, aminosulfonyl, C₁₋₆ alkylaminosulfonyl, di(C₁₋₆ alkyl)aminosulfonyl, aminosulfonylamino, C₁₋₆ alkylaminosulfonylamino, di(C₁₋₆ alkyl)aminosulfonylamino, aminocarbonylamino, C₁₋₆ alkylaminocarbonylamino, and di(C₁₋₆ alkyl)aminocarbonylamino.
 6. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein R² is selected from H, C₁₋₆ alkyl, and CN, wherein the C₁₋₆ alkyl is optionally substituted with 1 or 2 OH groups.
 7. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein Cy¹ is selected from phenyl, C₃₋₆ cycloalkyl, and 5-6 membered heteroaryl, wherein the phenyl, C₃₋₆ cycloalkyl, and 5-6 membered heteroaryl are each optionally substituted with 1, 2, 3, or 4 independently selected R⁷ substituents.
 8. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein Cy¹ is phenyl which is optionally substituted with 1, 2, 3, or 4 independently selected R⁷ substituents.
 9. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein each R⁷ is independently selected from D, halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, CN, OH, amino, C₁₋₃ alkylamino, and di(C₁₋₃ alkyl)amino.
 10. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein Cy¹ is 3-cyanophenyl, wherein the 3-cyanophenyl is optionally substituted by one of F or CH₃.
 11. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein R⁴ is —C(O)NR⁵R⁶; and wherein R⁵ is selected from H, C₁₋₆ alkyl, and C₁₋₆ haloalkyl; and R⁶ is selected from H, C₁₋₆ alkyl, and C₁₋₆ haloalkyl.
 12. The compound of claim 11, or a pharmaceutically acceptable salt thereof, wherein R⁵ is H.
 13. The compound of claim 11, or a pharmaceutically acceptable salt thereof, wherein R⁶ is C₁₋₆ alkyl.
 14. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein R⁴ is -L-Cy⁴.
 15. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein L is selected from Y¹, C₁₋₆ alkylene, C₂₋₆ alkenylene, C₂₋₆ alkynylene, C₁₋₆ alkylene-Y¹, and Y¹—C₁₋₆ alkylene, wherein said alkylene linking group is optionally substituted with 1, 2, or 3 independently selected R^(8D) substituents and optionally substituted with 1 R⁸ substituent.
 16. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein L is Y¹.
 17. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein L is C₁₋₆ alkylene, which is optionally substituted with 1, 2, or 3 independently selected R^(8D) substituents and optionally substituted with 1 R⁸ substituent.
 18. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein L is C₁₋₆ alkylene-Y¹, wherein said alkylene linking group is optionally substituted with 1, 2, or 3 independently selected R^(8D) substituents and optionally substituted with 1 R⁸ substituent.
 19. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein L is Y¹—C₁₋₆ alkylene, wherein said alkylene linking group is optionally substituted with 1, 2, or 3 independently selected R^(8D) substituents and optionally substituted with 1 R⁸ substituent.
 20. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein each Y¹ is —NR^(Y)—; and wherein each R^(Y) is independently selected from H, C₁₋₆ alkyl, and C₁₋₆ haloalkyl.
 21. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein each R^(Y) is independently selected from H and C₁₋₆ alkyl.
 22. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein L is selected from —NR^(Y)—, C₁₋₃ alkylene, C₁₋₃ hydroxyalkylene, and C₁₋₃ aminoalkylene.
 23. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein L is selected from —NH—, —CH₂—, —CH(OH)—, —CH(NH₂)—, —CH₂—NH— and —NH—CH₂—.
 24. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein Cy⁴ is selected from phenyl, C₃₋₇cycloalkyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl, each of which is optionally substituted with 1, 2, 3, 4, or 5 substituents independently selected from R^(8D) and R⁸.
 25. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein Cy⁴ is selected from phenyl, cyclohexyl, pyridyl, pyrrolidinonyl, and imidazolyl, wherein the phenyl, cyclohexyl, pyridyl, pyrrolidinonyl, and imidazolyl are each optionally substituted with 1, 2, 3, 4, or 5 substituents independently selected from R^(8D) and R⁸.
 26. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein each R^(8D) is independently selected from OH, CN, halo, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkoxy, amino, C₁₋₆ alkylamino, and di(C₁₋₆ alkyl)amino.
 27. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein each R⁸ is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl, CN, NO₂, OR^(a8), NHOR^(a8), C(O)R^(b8), C(O)NR^(c8)R^(d8), C(O)NR^(c8)(OR^(a8)), C(O)NR^(a8), NR^(c8)R^(d8), NR^(c8)C(O)R^(b8), NR^(c8)C(O)OR^(a8), NR^(c8)C(O)NR^(c8)R^(d8), NR^(c8)S(O)₂R^(b8), NR^(c8)S(O)₂NR^(c8)R^(d8), S(O)₂R^(b8), and S(O)₂NR^(c8)R^(d8), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₃₋₇ cycloalkyl 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl of R⁸ are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8A) substituents; and wherein each R^(a8), R^(b8), R^(c8), and R^(d8) is independently selected from H, C₁₋₆ alkyl, C₁₋₆haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8A) substituents.
 28. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein each R^(8A) is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl, CN, OR^(a81), SR^(a81), C(O)R^(b81), C(O)NR^(c81)R^(d81), OC(O)OR^(a81), OC(O)R^(b81), OC(O)NR^(c81)R^(d81), NR^(c81)R^(d81), NR^(c81)C(O)R^(b81), NR^(c81)C(O)OR^(a81), NR^(c81)C(O)NR^(c81)R^(d81), NR^(c81)S(O)NR^(c81)R^(d81), NR^(c81)S(O)R^(b81)R^(b81), and NR^(c81)S(O)₂R^(b81), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl of R^(8A) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8B) substituents; and wherein each R^(a81), R^(b81), R^(c81) and R^(d81) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl of R^(a81), R^(b81), R^(c81), and R^(d81) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8B) substituents; or, any R^(c81) and R^(d81), attached to the same N atom, together with the N atom to which they are attached, form a 4-10 membered heterocycloalkyl group, wherein the 4-10 membered heterocycloalkyl group is optionally substituted with 1, 2, 3, or 4 independently selected R^(8B) substituents.
 29. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein each R^(8A) is independently selected from OH, NO₂, CN, halo, C₁₋₃ alkyl, C₂₋₃ alkenyl, C₂₋₃ alkynyl, C₁₋₃ haloalkyl, C₁₋₃ alkoxy, C₁₋₃ haloalkoxy, amino, C₁₋₃ alkylamino, and di(C₁₋₃ alkyl)amino.
 30. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein each R^(8B) is independently selected from halo, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, CN, OR^(a82), SR^(a82), C(O)R^(b82), C(O)NR^(c82)R^(d82), C(O)OR^(a82), OC(O)R^(b82), OC(O)NR^(c82)R^(d82), NR^(c82)R^(d82), NR^(c82)NR^(c82)R^(d82), NR^(c82)C(O)R^(b82), NR^(c82)C(O)OR^(a82), NR^(c82)C(O)NR^(c82)R^(d82), NR^(c82)S(O)₂R^(b82), NR^(c82)S(O)₂R^(c82)R^(d82), S(O)₂NR^(b82), and S(O)₂NR^(c82)R^(d82), wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl of R^(8B) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8C) substituents; and wherein each R^(a82), R^(b82), R^(c82), and R^(d82) is independently selected from H, C₁₋₆ alkyl, C₁₋₆ haloalkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl, wherein the C₁₋₆ alkyl, C₂₋₆ alkenyl, and C₂₋₆ alkynyl of R^(a82), R^(b82), R^(c82) and R^(d82) are each optionally substituted with 1, 2, 3, or 4 independently selected R^(8C) substituents.
 31. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein each R^(8C) is independently selected from OH, CN, halo, C₁₋₆ alkyl, C₂₋₆ alkenyl, C₂₋₆ alkynyl, C₁₋₆ haloalkyl, cyano-C₁₋₆ alkyl, HO—C₁₋₆ alkyl, C₁₋₆ alkoxy-C₁₋₆ alkyl, C₁₋₆ alkoxy, C₁₋₆ haloalkoxy, amino, C₁₋₆ alkylamino, di(C₁₋₆ alkyl)amino, and carboxy.
 32. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein: R¹ is H; R² is selected from H, CN, and hydroxymethyl; Cy¹ is 3-cyanophenyl, wherein the 3-cyanophenyl is optionally substituted by one of F or CH₃; R⁴ is selected from —C(O)NR⁵R⁶ and -L-Cy⁴; R⁵ is H; R⁶ is C₁₋₃ alkyl; L is selected from Y¹, C₁₋₃ alkylene, C₁₋₃ alkylene-Y¹, and Y¹—C₁₋₃ alkylene, wherein said alkylene linking groups are each optionally substituted with 1, 2, or 3 independently selected R^(8D) substituents and optionally substituted with 1 R⁸ substituent; each Y¹ is —NR^(Y)—; R^(Y) is selected from H and C₁₋₃ alkyl; Cy⁴ is selected from phenyl, cyclohexyl, pyridyl, pyrrolidinonyl, and imidazolyl, wherein the phenyl, cyclohexyl, pyridyl, pyrrolidinonyl, and imidazolyl are each optionally substituted with 1, 2, 3, 4, or 5 substituents independently selected from R^(8D) and R⁸; each R⁸ is independently selected from halo, C₁₋₃ alkyl, C₁₋₃ haloalkyl, C₂₋₄ alkenyl, C₂₋₄ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl, CN, NO₂, OR^(a8), NHOR^(a8), C(O)R^(b8), C(O)NR^(c8)R^(d8), C(O)NR^(c8)(OR^(a8)), C(O)OR^(a8), NR^(c8)R^(d8), NR^(c8)C(O)R^(b8), NR^(c8)C(O)OR^(a8), NR^(c8)C(O)NR^(c8)R^(d8), NR^(c8)S(O)₂R^(b8), NR^(c8)S(O)₂NR^(c8)R^(d8), S(O)₂R^(b8), and S(O)₂NR^(c8)R^(d8), wherein the C₁₋₃ alkyl, C₂₋₄ alkenyl, C₂₋₄ alkynyl, phenyl, C₃₋₇ cycloalkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, phenyl-C₁₋₄ alkyl, C₃₋₇ cycloalkyl-C₁₋₄ alkyl, (5-6 membered heteroaryl)-C₁₋₄ alkyl, and (4-7 membered heterocycloalkyl)-C₁₋₄ alkyl of R⁸ are each optionally substituted with 1, 2, or 3 independently selected R^(8A) substituents; each R^(a8), R^(b8), R^(c8), and R^(d8) is independently selected from H and C₁₋₃ alkyl, wherein the C₁₋₃ alkyl is optionally substituted with 1 or 2 independently selected R^(8A) substituents; each R^(8A) is independently selected from halo, C₁₋₃ alkyl, 5-6 membered heteroaryl, 4-7 membered heterocycloalkyl, CN, OR^(a81), SR^(a81), C(O)R^(b81), C(O)NR^(c81)R^(d81), C(O)OR^(a81), OC(O)R^(b81), OC(O)NR^(c81)R^(d81), NR^(c81)R^(d81), NR^(c81)C(O)R^(b81), R^(c81)C(O)OR^(a81), and NR^(c81)C(O)NR^(c81)R^(d81), wherein the C₁₋₃ alkyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl of R^(8A) are each optionally substituted with 1, 2, or 3 independently selected R^(8B) substituents; each R^(a81), R^(b81), R^(c81) and R^(d81) is independently selected from H, C₁₋₃ alkyl, and 4-7 membered heterocycloalkyl, wherein the C₁₋₃ alkyl and 4-7 membered heterocycloalkyl of R^(a81), R^(b81), R^(c81) and R^(d81) are each optionally substituted with 1, 2, or 3 independently selected R^(8B) substituents; or, any R^(c81) and R^(d81), attached to the same N atom, together with the N atom to which they are attached, form a 4-10 membered heterocycloalkyl group, wherein the 4-10 membered heterocycloalkyl group is optionally substituted with 1 or 2 independently selected R^(8B) substituents; each R^(8B) is independently selected from halo, C₁₋₃ alkyl, and 4-7 membered heterocycloalkyl, wherein the C₁₋₃ alkyl is optionally substituted with 1 or 2 independently selected R^(8C) substituents; and each R^(8C) is independently selected from OH, CN, halo, C₁₋₃ alkyl, C₁₋₃ haloalkyl, C₁₋₃ alkoxy, and carboxy.
 33. The compound of claim 1, wherein the compound of Formula (I) is a compound of Formula (III):

or a pharmaceutically acceptable salt thereof.
 34. The compound of claim 1, wherein the compound of Formula (I) is a compound of Formula (VII):

or a pharmaceutically acceptable salt thereof.
 35. The compound of claim 1, selected from: 3-(5-Amino-2-(hydroxy(phenyl)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile; 3-(5-Amino-2-benzyl-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile; 3-(5-Amino-2-(pyridin-2-ylmethyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile; 3-(5-Amino-2-(cyclohexylmethyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile; 3-(5-Amino-2-(3-(1-methyl-1H-pyrazol-4-yl)benzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile; 3-(5-Amino-2-((2-oxopyrrolidin-1-yl)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile; 3-(5-Amino-2-((1-methyl-1H-imidazol-2-yl)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile; 3-(5-Amino-2-(amino(phenyl)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile; 3-(5-Amino-2-benzyl-8-(hydroxymethyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile; 3-(5-Amino-2-(phenylamino)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)benzonitrile; 5-Amino-7-(3-cyanophenyl)-N-ethyl-[1,2,4]triazolo[1,5-c]pyrimidine-2-carboxamide; 3-(5-Amino-2-((2,6-difluorophenyl)(hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-methylbenzonitrile; 3-(5-Amino-2-((2,6-difluorophenyl)(hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile; 5-Amino-7-(3-cyano-2-fluorophenyl)-2-((2,6-difluorophenyl)(hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidine-8-carbonitrile; 3-(5-Amino-2-((2-fluoro-6-(((1-methyl-2-oxopyrrolidin-3-yl)amino)methyl)phenyl)(hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile; 3-(5-Amino-2-((2-fluoro-6-((6-methyl-5-oxo-2,6-diazaspiro[3.4]octan-2-yl)methyl)phenyl)(hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile; 3-(5-Amino-2-((2-((ethyl(2-oxopyrrolidin-3-yl)amino)methyl)-6-fluorophenyl)(hydroxy)methyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile; 2-(3-((2-((5-Amino-7-(3-cyano-2-fluorophenyl)-[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)methyl)-3-fluorobenzyl)amino)-2-oxopyrrolidin-1-yl)acetic acid; 3-(5-Amino-2-(2-fluoro-6-(((2-oxotetrahydrofuran-3-yl)amino)methyl)benzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile; 3-(5-Amino-2-(2-fluoro-6-(((2-oxopyrrolidin-3-yl)amino)methyl)benzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile; 3-(2-(2-((3-(2H-Tetrazol-5-yl)pyrrolidin-1-yl)methyl)-6-fluorobenzyl)-5-amino-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile; 3-(5-Amino-2-(2-(((1-ethyl-2-oxopyrrolidin-3-yl)amino)methyl)-6-fluorobenzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile; N-(1-(2-((5-Amino-7-(3-cyano-2-fluorophenyl)-[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)methyl)-3-fluorobenzyl)pyrrolidin-3-yl)acetamide; 3-(2-(2-((2-(2H-Tetrazol-5-yl)pyrrolidin-1-yl)methyl)-6-fluorobenzyl)-5-amino-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile; 1-(2-((5-Amino-7-(3-cyano-2-fluorophenyl)[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)methyl)-3-fluorobenzyl)pyrrolidine-3-carbonitrile; 3-(5-Amino-2-(2-fluoro-6-((6-methyl-5-oxo-2,6-diazaspiro[3.4]octan-2-yl)methyl)benzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile; 3-(5-Amino-2-(2-fluoro-6-(((1-methyl-2-oxopyrrolidin-3-yl)amino)methyl)benzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile; 2-(3-((2-((5-Amino-7-(3-cyano-2-fluorophenyl)-[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)methyl)-3-fluorobenzyl)(ethyl)amino)-2-oxopyrrolidin-1-yl)acetic acid; 3-(5-Amino-2-(2-((ethyl(1-methyl-2-oxopyrrolidin-3-yl)amino)methyl)-6-fluorobenzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile; 3-(5-Amino-2-(2-((ethyl(2-oxopyrrolidin-3-yl)amino)methyl)-6-fluorobenzyl)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile; 3-(5-Amino-2-(((6-(1-(piperidin-4-yl)-1H-pyrazol-4-yl)pyridin-2-yl)methyl)amino)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile; and 3-(5-Amino-2-(((6-(1-(2-morpholinoethyl)-1H-pyrazol-4-yl)pyridin-2-yl)methyl)amino)-[1,2,4]triazolo[1,5-c]pyrimidin-7-yl)-2-fluorobenzonitrile, or a pharmaceutically acceptable salt of any of the aforementioned.
 36. A pharmaceutical composition comprising a compound of claim 1, or a pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable excipient or carrier. 